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【单选题】
塔式起重机按照 分上回转达和下回转。( )
【单选题】
按热水采暖系统的循环动力不同,可分为自然循环热水采暖系统和机械循环热水采暖系统。( )
【单选题】
为保证热水系统的水温,补偿管路的热损失,热水系统应设置
【单选题】
热水系统设置膨胀罐的主要作用是( )。
【多选题】
抽取的样品一般应为一式三份,分别供()使用
【单选题】
7.He saw the police cars ______ around the corner.
【单选题】
4.Many people have accused the superpower of ____ bombing of the “innocent country”.
【单选题】
15.I feel terrible. I think I _____be sick.
【单选题】
11.The children were ______their father.
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18.I’d rather you _____that now than afterwards.
【单选题】
24.He might have been killed ____the timely arrival of the ambulance.
【单选题】
5.The driver coming in the opposite direction _______ to avoid the cow crossing the road.
【单选题】
8.They made a______ decision, which later led to the collapse of the economy.
【单选题】
2.At night, he _______ me all his secrets.
【单选题】
25. She put an extra blanket over the baby for fear that____.