第9题: [单项选择]Evidence (has been put forward) (showing) that astronauts (exposed) to long periods of weightlessness have (affected) quite severely. A. has been put forward B. showing C. exposed D. affected 参考答案:D 答案解析:[分析] 宾语从句主语that astronauts和谓语动词affect是被动关系,所以要改“have affected”为“have been affected”
第11题: [单项选择]Successful leaders ______ events rather than react to them. A. conquer B. dominate C. determine D. contest 参考答案:B 答案解析:conquer征服;dominate主导,控制;determine决定,断定;contest竞赛。react to是做出反应,相对来说比较被动,所以,空中应当填入与之恰恰相反的词。
第13题: [单项选择]CO2气体保护焊对供气系统的控制是,引弧时();焊接时 气流要可靠均匀,结束时()。 A. 要求提前供气约1-2S,应滞后停气2-3S B. 要求提前供气约2-3S,应滞后停气2-3S C. 要求提前供气约1-2S,应滞后停气1-2S D. 要求提前供气约2-3S,应滞后停气1-2S 参考答案:A