问题
单项选择题
下列土方机械设备中，最适宜用于水下挖土作业的是()。
A.铲运机
B.正铲挖掘机
C.反铲挖掘机
D.抓铲挖掘机
答案
参考答案：D
解析：抓铲挖掘机适用于开挖土质比较松软、施工面狭窄的深基坑、基槽，清理河床及水中挖取土，桥基、桩孔挖土，最适宜于水下挖土，或用于装卸碎石，矿渣等松散材料。 考点 建筑工程土方工程施工技术
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下列土方机械设备中，最适宜用于水下挖土作业的是()。
A.铲运机
B.正铲挖掘机
C.反铲挖掘机
D.抓铲挖掘机
参考答案：D
解析：抓铲挖掘机适用于开挖土质比较松软、施工面狭窄的深基坑、基槽，清理河床及水中挖取土，桥基、桩孔挖土，最适宜于水下挖土，或用于装卸碎石，矿渣等松散材料。 考点 建筑工程土方工程施工技术
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| It rained for four days. Mike couldn't go out and 1 with his friends. His parents went to work and had to 2 the boy at home. They bought some 3 for him. But he didn't like to read them. He stood by the 4 and looked outside. The rain 5 this morning and Mike was happy. But it was wet outside. His parents didn't 6 him go out and play there. They 7 the boy to read a book. But when they left he began to play behind the house. 8 his parents came back for lunch. His mother found the boy was very dirty." Oh, dearf Bcalled out the woman. "Look at your 9 ! How dirty they are! When did you see I was so dirty . 10 you?" "But I didn't see you when you were young, mum. "said the boy. | ||||
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