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【多选题】
新奥法的常用支护手段包括:A.
锚杆
B.
整体式衬砌
C.
喷射混凝土
D.
管片
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【单选题】When oil is being consumed by passing through the engine, it usually will cause heavy ______ to come from the exhaust, particularly after the engine has idled for several minutes.
A.
black smoke
B.
blue smoke
C.
white smoke
D.
steam
【单选题】Was it because it snowed last night ______ he didn't come?
A.
why
B.
that
C.
when
D.
then
【简答题】My steamboat voyage to Albany and back has turned out rather more favorable than I had expected. The distance form New York to Albany is 150 miles. I ran it up within 32 hours and down in 30. I had a ...
【简答题】( )Our teacher told us that James Watt ___ the steam engine. A.invented B.had invented C.has invented D.was inventing
【单选题】Was it because it snowed last night _____ you didn't come?
A.
when
B.
that
C.
so
D.
what
【简答题】据根短文内容判断正（T）误（F）。 Snow fell on the mountain. It snowed and snowed. The snow did not melt. It became deep and heavy. The snow on the bottom pressed together, then it became ice. The ice was very wide a...
【简答题】某药材中含有下列化合物,其提取分离过程如以下工艺,请将各化合物填于该工艺1、2、3、4的适当位置并说明原因。
【简答题】阅读短文，完成下列各题。 Snow fell on the mountain. It snowed and snowed. The snow did not melt (融化). It became deep and heavy. The snow on the bottom pressed (挤压) together, it became ice. The ice was very wide a...
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