求证： https://assets.asklib.com/psource/2016030217260364112.jpg .

https://assets.asklib.com/psource/2015110509173263996.jpg https://assets.asklib.com/psource/2015110509173368846.jpg https://assets.asklib.com/psource/2015110509173466893.jpg

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已知四棱锥P-ABCD，它的底面是边长为a的菱形，且∠ABC=120°，PC⊥平面ABCD，又PC=a，E为PA的中点。 https://assets.asklib.com/psource/2016030216372710187.jpg （1）求证：平面EBD⊥平面ABCD；（2）求点E到平面PBC的距离；（3）求二面角A-BE-D的大小。

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微分方程 https://assets.asklib.com/psource/2015110116014788369.png -4 https://assets.asklib.com/psource/2015110116020651779.png ′+5 https://assets.asklib.com/psource/2015110116020651779.png ＝0的通解为 https://assets.asklib.com/psource/2015110116020651779.png ＝（）。

A . ['['（C1+C2https://assets.asklib.com/psource/2015110116022342552.png ）e2rB . e（C1coshttps://assets.asklib.com/psource/2015110116022342552.png +C2sinhttps://assets.asklib.com/psource/2015110116022342552.png ）C . C1e2r+C2ehttps://assets.asklib.com/psource/2015110116022342552.png D . C1coshttps://assets.asklib.com/psource/2015110116022342552.png +C2sinhttps://assets.asklib.com/psource/2015110116022342552.png

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下列哪项不属于口腔器官（）。 https://assets.asklib.com/psource/2015090915593930516.jpg https://assets.asklib.com/psource/2015090915594960972.jpg https://assets.asklib.com/psource/2015090915595746460.jpg https://assets.asklib.com/psource/2015090916000549371.jpg

A . 牙齿 B . 涎腺 C . 扁桃体 D . 颌骨 E . 唇、颊、腭、舌、口底组织

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根据MRI表现，最可能的诊断是（） https://assets.asklib.com/psource/2015111616004868443.jpg https://assets.asklib.com/psource/2015111616005062793.jpg https://assets.asklib.com/psource/2015111616005257792.jpg https://assets.asklib.com/psource/2015111616005574757.jpg

A . 肺孢子虫Carinii感染 B . 真菌感染 C . 螺旋体感染 D . 弓形体感染 E . 血吸虫感染

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正三棱柱ABC-A 1 B 1 C 1 的底面边长为a，在侧棱BB 1 上截取 https://assets.asklib.com/psource/2016030216335191806.jpg ，在侧棱CC 1 上截取CE=a，过A、D、E作棱柱的截面ADE。 https://assets.asklib.com/psource/2016030216334761703.jpg （1）求△ADE的面积；（2）求证：平面ADE⊥平面ACC 1 A 1 。

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试求证https://assets.asklib.com/images/image2/201807201742141219.jpg

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https://assets.asklib.com/source/38811447839673723.png https://assets.asklib.com/source/21771447839683358.png https://assets.asklib.com/source/37171447839689839.png

A .https://assets.asklib.com/psource/6141447839704549.png B .https://assets.asklib.com/psource/581447839717169.png C .https://assets.asklib.com/psource/80211447839736697.png D .https://assets.asklib.com/psource/20631447839773083.png

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已知 https://assets.asklib.com/psource/2016030216173751529.jpg ，求证 https://assets.asklib.com/psource/201603021617396901.jpg 。

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https://assets.asklib.com/source/1473055371137024152.png 、 https://assets.asklib.com/source/1473055385722092841.png 、 https://assets.asklib.com/source/1473055399690044180.png 、 https://assets.asklib.com/source/1473055413490018042.png 、（）

A .https://assets.asklib.com/psource/1473055429669006468.png B .https://assets.asklib.com/psource/1473055439731016679.png C .https://assets.asklib.com/psource/1473055450058054624.png D .https://assets.asklib.com/psource/1473055460851063288.png

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常见的椎管内肿瘤（如图所示）有（） https://assets.asklib.com/psource/2015083009411414972.jpg https://assets.asklib.com/psource/2015083009411712420.jpg https://assets.asklib.com/psource/2015083009411964955.jpg https://assets.asklib.com/psource/2015083009412254926.jpg

A . 脊膜瘤 B . 胶质瘤 C . 血管瘤 D . 上皮样囊肿 E . 神经鞘瘤

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如图，过半径为R的球面上一点P作三条两两垂直的弦PA、PB、PC。（1）求证：PA 2 +PB 2 +PC 2 为定值；（2）求三棱锥P-ABC的体积的最大值。 https://assets.asklib.com/psource/2016030216411858521.jpg

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如图箭头所示为大脑哪个部位（） https://assets.asklib.com/psource/2015111710480467521.gif https://assets.asklib.com/psource/2015111710481386329.gif https://assets.asklib.com/psource/2015111710481660241.gif https://assets.asklib.com/psource/2015111710481987584.gif

A . 顶叶 B . 枕叶 C . 小脑 D . 脑干 E . 额叶

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已知边长 https://assets.asklib.com/psource/2016071710544941816.jpg ，方位角 https://assets.asklib.com/psource/2016071710545061361.jpg ，则 https://assets.asklib.com/psource/201607171054531993.jpg 和 https://assets.asklib.com/psource/2016071710545561685.jpg 分别为：()

A . +31.401m，+66.420m B . +31.401m，-66.420m C . -31.401m，+66.420m D . -66.420m，+31.401m

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图示三力矢 https://assets.asklib.com/psource/2015110210014063428.png 1、 https://assets.asklib.com/psource/2015110210014063428.png 2、 https://assets.asklib.com/psource/2015110210014063428.png 3的关系是（）。 https://assets.asklib.com/psource/2015110210023161678.png

A . ['['https://assets.asklib.com/psource/2015110210014063428.png 1+https://assets.asklib.com/psource/2015110210014063428.png 2+https://assets.asklib.com/psource/2015110210014063428.png 3＝0B .https://assets.asklib.com/psource/2015110210014063428.png 3＝https://assets.asklib.com/psource/2015110210014063428.png 1+https://assets.asklib.com/psource/2015110210014063428.png 2C .https://assets.asklib.com/psource/2015110210014063428.png 2＝https://assets.asklib.com/psource/2015110210014063428.png 1+https://assets.asklib.com/psource/2015110210014063428.png 3D .https://assets.asklib.com/psource/2015110210014063428.png 1＝https://assets.asklib.com/psource/2015110210014063428.png 1+https://assets.asklib.com/psource/2015110210014063428.png 3

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请判断下列符号表示何种二级管。 https://assets.asklib.com/psource/2015061816500188250.jpg https://assets.asklib.com/psource/2015061816501092569.jpg https://assets.asklib.com/psource/2015061816501236941.jpg https://assets.asklib.com/psource/2015061816501482045.jpg

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微分方程 https://assets.asklib.com/psource/2015110115590070639.png + https://assets.asklib.com/psource/2015110115590070639.png 6′+9 https://assets.asklib.com/psource/2015110115590070639.png ＝0的通解为 https://assets.asklib.com/psource/2015110115590070639.png ＝（）。

A . ['（C1+C2https://assets.asklib.com/psource/2015110115592384905.png ）ehttps://assets.asklib.com/psource/2015110116010527652.png B . （C1+C2https://assets.asklib.com/psource/2015110115592384905.png ）e-https://assets.asklib.com/psource/2015110116010527652.png C . C1ehttps://assets.asklib.com/psource/2015110116010527652.png +C2e-https://assets.asklib.com/psource/2015110116010527652.png D . C1cos3https://assets.asklib.com/psource/2015110115592384905.png +C2sin3https://assets.asklib.com/psource/2015110115592384905.png

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已知数列{a n }中，a 1 =1，且 https://assets.asklib.com/psource/2016030616111544372.jpg （1）求证：数列 https://assets.asklib.com/psource/2016030616111743839.jpg 是等差数列；（2）求数列{a n }的通项公式。

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1https://assets.asklib.com/source/1470361829907038628.png https://assets.asklib.com/source/1470361792608072582.png https://assets.asklib.com/source/1470361800727081642.png ( )

A .https://assets.asklib.com/psource/1470361868679083749.png B .https://assets.asklib.com/psource/1470361877934054498.png C .https://assets.asklib.com/psource/1470361890226082571.png D .https://assets.asklib.com/psource/1470361897027083184.png

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如图，下面解剖标志正确的是 https://assets.asklib.com/psource/20140512093522905.jpg https://assets.asklib.com/psource/2014051209353999618.jpg https://assets.asklib.com/psource/2014051209354354276.jpg https://assets.asklib.com/psource/2014051209354796747.jpg

A . A．颌下三角 B . B．颏下三角 C . C．颈动脉三角 D . D．肌三角 E . E．锁骨上三角

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0,https://assets.asklib.com/source/1470294789860044047.png , https://assets.asklib.com/source/1470294797629070776.png , https://assets.asklib.com/source/1470294805275061167.png , https://assets.asklib.com/source/1470294812835026599.png , ( )

A .https://assets.asklib.com/psource/1470294861970098210.png B .https://assets.asklib.com/psource/1470294868891001815.png C .https://assets.asklib.com/psource/1470294876508035741.png D .https://assets.asklib.com/psource/1470294883505078627.png

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https://assets.asklib.com/source/1473040973362041513.png 、 https://assets.asklib.com/source/1473041148171008214.png 、 https://assets.asklib.com/source/1473041081070030054.png 、 https://assets.asklib.com/source/1473041081093013547.png 、（）

A .https://assets.asklib.com/psource/1473041167467022053.png B .https://assets.asklib.com/psource/1473041176257076342.png C .https://assets.asklib.com/psource/1473041183658006100.png D .https://assets.asklib.com/psource/1473041190642013974.png

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求证： https://assets.asklib.com/psource/2016030217260364112.jpg .

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