便利取样（convenience sampling）

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• Forklift truck is very convenient equipment for（）.

  A . loadinggoods B . unloadinggoods C . transportationbrokers D . insurancebrokers

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• （）is very convenient equipment for loading and unloading goods.

  A . Crane B . pallet truck C . Fork lift D . Fork lift truck

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• 执行语句Open"Sample.dat"ForRandomAs#1Len=50后，对文件"Sample.dat"中的数据能够进行的操作是（）

  A . 只能写不能读 B . 只能读不能写 C . 即可以读，也可以写 D . 不能读，也不能写

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• Please reply to our inquiry（）your earliest convenience.

  A . by B . upon C . for D . at

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• Convenience（便利）

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• It was convenient（）close to work.

  A . to living B . living C . live D . lived

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• It is very convenient（）here.

  A . living B . live C . lived D . to live

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• It's very convenient（）here

  A . to live B . live C . lived D . living

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• 简单随机取样（simple random sampling）

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• Convenience goods are goods that consumers like to buy quickly and conveniently.

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• 手机的发明为我们提供了各种方便。(convenience)（3.0分）

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• 观看视频 回答问题I’m really sorry for the inconvenience.When see the word “inconvenience”, we can associate it with convenience, inconvenient and convenient.

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• New applications and services bring people’s life convenience.

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• Convenience products include_________.

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• 在下面的类定义中，错误的语句是（ ）。class sample{public:sample(int val); //①~sample( ); //②private:int a=2.5; //③public:sample( ); //④};

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• 有如下程序：include＜iostream＞using namespace std;class sample{private:int x,y;public:sampl

  有如下程序： include＜iostream＞ using namespace std; class sample { private: int x,y; public: sample(int i,int j) { x=i; y=j; } void disp() { cout＜＜"disp1"＜＜endl; } void disp()const { cout＜＜"disp2"＜＜endl; } }; int main() { const sample a(1,2); a.disp(); return 0; } 该程序运行后的输出结果是()。 A．disp1 B．disp2 C．disp1 disp2 D．程序编译时出错

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• 船样（Production Sample/Shipping Sample)是代表出口货物的品质水平的样品，也称“船头版”或“大货

  船样(Production Sample/Shipping Sample)是代表出口货物的品质水平的样品，也称“船头版”或“大货版”。如大货是以海运方式运输出口的，则要求船样以空运方式直接寄客户。在计算出口数量时，一般要将船样的数量一并计算在内。() A．正确 B．错误

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• While ATMs have added some convenience to our live...

  While ATMs have added some convenience to our lives, a few risks have also popped up(发生). To stay out of trouble, you should follow these steps: Look Around Before You Approach Take a quick look at your surroundings. See if anybody or anything looks suspicious. Is anybody watching you or standing too close？ Use ATMs That You're Familiar With If you know an area well and have used an ATM before, you can expect similar results. In other words, your chances of getting robbed at a "familiar" ATM are less than your chances of getting robbed at a "new" ATM. Have Your Card Ready While Approaching the ATM If you're quick, your chances are better. On the other hand, you're exposing yourself unnecessarily if you stand around the ATM digging through your wallet or purse for that special card. Get it out before you leave your car or as you're approaching the ATM. Use ATMs That are Well Lit and Safe Only somebody with a valid card can get through the door of an ATM booth. This makes it less likely that an "undesirable(不受欢迎的)" will approach you just as your cash is coming out. Obviously this is not foolproof(十分安全的)—a crook(骗子) can steal somebody's card and use it immediately. Get Cash Out of Sight This is pretty obvious, but some people need to be more conscious. Whether it's a lot of money or a little, cash can be tempting when it's out in the open. Points to remember when using an ATM Before you come to an ATM,【46】. You'd better use a【47】ATM. Take out your【48】before leaving your car or when approaching the ATM. Because a crook can steal somebody's card and use it,【49】is not foolproof. When you want to get your cash, get it【50】.

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• 东山村落多分布在 ①地形平坦 ② 湖岸 ③ 海拔10米以上地区 ④ 地下水丰富 ⑤ 交通便利地方 The villages in Dongshan are mostly located at ① fat terrain ② lake shore ③ areas above 10 meters ④ areas with rich groundwater ⑤ areas with convenient transportation

  A．①② B．②③ C．③④ D．④⑤

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• 以下程序代码能否通过编译,如果通过编译,运行“ java Sample ”时会出现什么情况 public class Sample{ private static final int var; Sample（）; }}

  A．编译时出错：在构造方法中不允许给staticfinal类型的成员变量赋值。 B．编译时出错：main方法中无法访问private类型的变量var。 C．运行时出错：变量var没有被初始化。 D．运行时打印“Value is: 1”。

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• The highest frequency of a signal is ,sampling angular frequency is , , in order to avoid aliasing when sampling this signal, what pre-processing is required before sampling （）

  A．quantization B．denoising C．modulation D．anti-aliasingfiltering

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• 在下面的类定义中，错误的语句是class Sample{public：Sample（int val)；//①～Sample（)： //②private：

  在下面的类定义中，错误的语句是 class Sample { public： Sample(int val)； //① ～Sample()： //② private： int a=2.5； //③ Sample()； //④ }； A．①②③④ B．② C．③ D．①②③

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• 有以下程序：include＜iostream＞using namespace std；class sample{private：int n；public：sample（

  有以下程序： include＜iostream＞ using namespace std； class sample { private： int n； public： sample(){} sample(int m) { n=m； } sample add(sample s1，sample s2) { this-＞n=s1.n+s2.n； return(*this)； } void disp() { cout＜＜"n"＜＜n＜＜end1； } }； int main() { sample s1(10)，s2(5)，s3； s3．add(s1，s2)； s3．disp()； return 0； } 程序运行后，输出的结果是 A．n=10 B．n=5 C．n=20 D．n=15

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