问题
单项选择题
履带起重机的动臂,为多节组装桁架结构,其下端()于转台前部。
A.用螺栓固定
B.铰装
C.铆接
D.焊接
答案
参考答案:B
履带起重机的动臂,为多节组装桁架结构,其下端()于转台前部。
A.用螺栓固定
B.铰装
C.铆接
D.焊接
参考答案:B
完形填空。 | |||
Mrs Green lives in the country (乡村), and she doesn't know London very well. One day, she goes to London. She can't find her 1 . Just then she 2 a man near a bus stop. "I can ask him the way," she says to 3 and asks," Excuse me, will you please 4 me the way to King Street?" The man smiles with 5 answer. He 6 know English. He speaks Russian. He is a visitor. Then he 7 his hand into his pocket (口袋), 8 a piece of paper and lets her 9 it. On the paper are these words, "Sorry, I 10 English. | |||
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