第1题: [单项选择]磨煤机大瓦温度不超过()。 A. 40℃ B. 50℃ C. 60℃ D. 70℃ 参考答案:B
第2题: [单项选择]Whatever his former conduct ______ , his circumstance should exempt him from rebuke now.. A. may have been B. can be C. had have been D. could have been 参考答案:A 答案解析:虚拟语气题。“情态动词+完成时”表示对过去的事情做结论、推测、判断。这里表示作结论。这句话从句是过去时,主句表示现在,也就是我们所说的错综时态虚拟,所以选项[B)和[C]不合语法。选项[A]和[D]合