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【单选题】
管道沟槽底部的开挖宽度的计算公式为：B=D1+2(b1+b2+b3)，则Dl代表：（ ）。A.
管道结构或的内缘宽度(mm)
B.
管道结构或的外缘宽度(mm)
C.
管道一侧的支撑厚度(mm)
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举一反三
【单选题】The longexpected match was ________ at halftime because of the poor weather conditions.
A.
disappeared
B.
removed
C.
abandoned
D.
continued
【单选题】Why did the forest fires become more acute this year?
A.
Because of the lack of sufficient resources.
B.
Because of the worst drought and the heat wave.
C.
Because of the long time strong winds.
D.
Because of the neglect of duty of the officials.
【单选题】Why did the forest fires become more acute this year?
A.
It was because of the lack of sufficient resources.
B.
It was because of the worst drought and the heat wave.
C.
It was because of the long time strong winds.
D.
It was because of the neglect of duty of the officials.
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