第3题: [多项选择]高压断路器的主要作用有()。 A. 接通电流 B. 分断负荷电流 C. 切断过载电流 D. 切断短路电流 E. 漏电保护 参考答案:A,B,C,D
第4题: [单项选择]This toothed whale has a large, square head with ______ the so-called spermaceti. A. cavity to contain B. cavity containing C. the cavity for containing D. a cavity that contains 参考答案:D 答案解析:cavity空穴,是可数名词。此句是一个定语从句。
第5题: [单项选择]居里(Ci)与贝克勒尔(Bq)之间的换算关系是1居里等于() A. 3.7×108贝克勒尔 B. 3.7×1012贝克勒尔 C. 3.7×109贝克勒尔 D. 3.7×1010贝克勒尔 E. 3.7×106贝克勒尔 参考答案:D
第15题: [单项选择]The military move was to integrate the West German divisions into the Atlantic defense system. A. complete B. exclude C. entail D. incorporate 参考答案:D
第16题: [单项选择]Where are the man and the woman A. They are in a shop. B. They are in a museum (博物馆). C. They are at the cinema. 参考答案:B 答案解析:[听力原文] M: Look! There’s an old teapot (茶壶) on show. Isn’t it beautiful! What was that pot used fo