水泵各法兰结合面间必须涂()。
A.黄油
B.滑石粉
C.颜料
D.胶水
参考答案:A
下图的四幅天气图反映了一次寒潮的天气过程。结合图文材料,回答下列问题。
小题1:按照此次寒潮天气发生的过程,四幅天气图由先到后的排序应为
A.a→c→b→d
B.b→c→d→a
C.c→b→d→a
D.d→a→c→b小题2:据图中的四幅天气图判断,下列城市的天气状况接近实际的是
A.a—武汉地区晴朗温暖
B.b—天津地区大风降温
C.c—北京地区雷雨交加
D.d—杭州地区阴雨连绵
The AntiJapanese War ________ in 1937 and ________ eight years. [ ]
A. was broken out; was lasted
B. was broken out; lasted
C. broke out; was lasted
D. broke out; lasted