第19题: [单项选择]They all returned to the village ______ that the danger was over. A. convincing B. convinced C. to convince D. having been convinced 参考答案:D 答案解析:分词短语作状语。此处现在分词短语作状语,表示原因,“convinced that the danger was over"这个动作发生在“returned to the village”之前,因此用完
第37题: [单项选择]A表示可控硅的()极。 A. 阳 B. 阴 C. 控制 D. 发射 参考答案:A
第38题: [简答题]Industrial psychologists have also studied the effects of fatigue on workers to de-termine the length of working time that yields the greatest productivity. 参考答案:产业心理学家还研究疲劳对工人的影响,来决定能够产生最大生产率的工作时间长度。
第39题: [单项选择]在SQL语句中,删除视图语句的是( )。 A. ZAP VIEW B. ALDER VIEW C. DELETE VIEW D. DROP VIEW 参考答案:D 答案解析:[解析] 在SQL语句中,删除视图语句的是DROP VIEW。