题目

－Mary, how did your Math test go?  －I had thought I _________, but in fact I came in the top 10% in my class. A. should have failed                          B. couldn’t have failed C. might have failed                           D. shouldn’t have failed 答案：C下图甲是“某城市风向频率图”，图乙是“该城市冬季近地面大气层不同时刻气温随高度变化过程示意图”，读图回答下列各题。1.该城市计划新建以煤为燃料的火力发电厂，最合适的厂址应布局在城市的A.东北方 B.东南方C.西南方 D.西北方2.该发电厂烟囱的设计高度应不低于A.50米 B.75米C.100米 D.150米