毒效应谱（spectrum of toxic effects）

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• 根据人群健康效应谱，从弱到强的5级效应的分布规律是（）

  A、两头大，中间小 B、两头小大，中间大 C、最弱的效应比例大 D、最强的效应比例大 E、都一样大

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• 根据人群健康效应谱，从弱到强的5级效应的分布规律是（）。

  A . 两头大，中间小 B . 两头小大，中间大 C . 最弱的效应比例大 D . 最强的效应比例大 E . 都一样大

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• 有关毒效应谱的叙述中不确切的是（）

  A . 毒效应的性质与强度变化构成毒效应谱 B . 毒效应谱变化从微小的生理生化变化到临床中毒直至死亡 C . 毒效应一般由毒作用终点的观察指标来检测 D . 有机磷农药抑制血液中的胆碱酯酶活性属于毒效应的特异指标 E . 苯胺可致红细胞内高铁血红蛋白形成属于毒效应的非特异指标

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• 毒效应谱

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• Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications？（）

  A .  They are both regions of lowest loss. B .  They are both regions of low reflections. C .  They are both regions of low index of refraction. D .  They are both regions of low chromatic dispersion. E .  They are both regions of low Polarization Mode Dispersion （PMD）.

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• For which two of these purposes are Cisco Spectrum Expert used?（）

  A . audit VoWLAN cell edge coverage B . verify RFID tag coverage by four access points at -75 dBm C . audit microwave oven interference D . audit 802.11a channel 36 utilization E . create test scripts for 802.11n bonded channel throughput test

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• 毒作用（毒效应、不良效应）分类

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• 英译中（Translate）：toxicity of single salt（）

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• 天然除虫菊酯杀虫毒力高，杀虫谱广，对光稳定，是一种理想的杀虫剂。

  A . 正确 B . 错误

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• However, results from several small studies in humans have yielded inconclusive evidence of a beneficial _____ of ascorbic acid on lead toxicity.

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• Of all the amplifiers, this product with its wide range provides __________ stability within the audible spectrum.

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• The ________ class of the herbs may possess some toxicity.

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• In order to reduce or restrain the toxicity and side effects of Banxia, Shengjiang is often added to it.

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• Some animal studies suggest that ascorbic acid may _____ lead and decrease the risk of the toxic effects of lead.

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• to narrow the spectrum of choice

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• It is predicted by experts that the number of animals used for toxicity testing in Europe will quintuple due to a plan to have a large variety of chemical tested.

  A．Y B．N C．NG

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• Which one of the following statements is NOT true about the sentence “On one end of the spectrum , we’ve heard the implication that my candidacy is somehow an exercise in affirmative action ”？

  A.“Spectrum” here refers to a wide variety of different opinions. B.Obama tries to respond to some of the doubts over his candidacy. C.Obama tries to point out a misjudgment a lot of people had for his candidacy --- Obama could become the candidate of the president just because he took advantage of some of the policies that favored the underprivileged people such as the black, the women, the disabled in order to ensure the social equality and his candidacy had nothing to do with his qualification D.Obama tries to point out a misjudgment a lot of people had for his candidacy --- Obama could become the candidate of the president just because a lot of people agree to do so.

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• In order to reduce or restrain the toxicity and side effects of Banxia, we often add

  是 否

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