A. the Apollo mission was very successful B. protection from space radiation is no easy job C. astronauts will have deformed children or grandchildren D. radiation is not a threat to well-protected space explorers 参考答案:B 答案解析:[解析] 此题可用排除法。A文中没有评论,C和D都与文中的内容相反,因此可确认B为正确答案。
第13题: [单项选择]高血压危象时,血压可达()。 A. 收缩压达33.8kPa,舒张压≥15.6kPa B. 收缩压达30.8kPa,舒张压≤15.6kPa C. 收缩压达33.8kPa,舒张压≤15.6kPa D. 收缩压达30.8kPa,舒张压≥15.6kPa E. 收缩压达30.8kPa,舒张压≥15kPa 参考答案:A
第16题: [单项选择]Scarcely ______those words when suddenly the monster was transformed into a very handsome youth. A. had he uttered B. did he utter C. he had uttered D. he did utter 参考答案:A 答案解析:这道题是典型的否定副词提前的倒装结构,这类的结构有Hardly…when和No sooner…than。第二点要注意的是,当从句是过去时态时,主句应使用过去完成时。