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【多选题】
二氧化碳气体保护焊的设备有（）及供气系统组成。A.
弧焊电源
B.
控制箱
C.
送丝机
D.
焊炬
E.
插头
手机使用
分享
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反馈参考答案：
举一反三
【单选题】听力原文：Woman: I didn't read this morning's paper or yesterday's, either. I didn't have time to get to the newsstand to buy one. Man: You should have it delivered. Then it would be waiting for you in you...
A.
She didn't have money to buy one.
B.
She didn't have time to buy one.
C.
It wasn't delivered on time.
D.
She read yesterday's instead.
【单选题】— I didn’t see you at Kangkang’s birthday party. — I didn’t go because I _____ .
A.
invited
B.
wasn’t invited
C.
didn’t invite
【单选题】I didn't stop at John's house because he had visitors, and I didn't want to butt in.
A.
intrude
B.
incur
C.
infer
D.
intercept
【单选题】— Didn’t you go to your sister’s wedding? — No, I didn’t; I’d like to have, ________. [ ]
A.
though
B.
either
C.
too
D.
instead
【简答题】如图,两条等温线的温度分别为Ta,Tb。1mol理想气体经过路径1231的W I与经过路径45的WII大小关系是(__)。
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