第8题: [单项选择]Which of the following problems may occur if the clearance between a piston and cylinder liner is insufficient?() A. Excessive wear B. Scuffing of the liner C. Piston seizure D. All of the above 参考答案:D
第33题: [单项选择]Gently _____ her words were spoken, there was no mistaking that she was displeased. A. if B. while C. as D. though 参考答案:C 答案解析:[解析] 连词用法题。as在引导让步状语从句的时候,经常把形容词、副词、名词放在as前面,然后后接主谓成分。再比如:Young as he is,he knows a lot.(尽管他很小,他却懂得很