第1题: [单项选择]The directions were so _______ that it was impossible to complete the assignment. A. ingenious B. ambitious C. notorious D. ambiguous 参考答案:D 答案解析:[解析] A. ingenious心灵手巧的,奇妙的;B.ambitious野心勃勃;C. notorious臭名昭著的;D.ambiguous不明确的,有歧义的。根据句意应选D。句意为:由于指示不明
第13题: [单项选择]In the desert, severe wind and sandstorms often force my business to close down because of the ______ of storm damage. A. chance B. possibility C. threat D. likelihood 参考答案:C 答案解析:句意:在沙漠里,由于风暴灾害的威胁,强风和沙尘暴经常迫使我暂停营业。根据句意可知,沙漠里经常发生风暴,因此此处强调的是风暴灾害的威胁,而非可能性。故选C。
第22题: [单项选择]Jackson: What a lovely coat you are wearing Chester: (). A. Of course. It's excellent. You should buy one. B. No. It's not very expensive, you see. C. Thank you. My husband gave it to me for my thirtieth birthday. D. Yes. I don't like it very much. 参考答案:C 答案解析:
第28题: [单项选择]一般地讲,随着研究中的样本含量增加,下列哪一个指标会相应地减小()。 A. 偏倚 B. 系统误差 C. 随机误差 D. 准确度 E. 有效性 参考答案:C 答案解析:偏倚是一种系统误差,它与随机误差的区别在于随机误差随样本增大而减少,假定样本增加到无穷大,则随机误差趋向于零,而系统误差却不受样本增大的影响,即使样本增加至无穷大,系统误差仍维持原样。