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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
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【单选题】I was eleven when we had to move out of the big old house in which I had spent my whole life. Each time I thought of that, I felt very sad. When the final day came, I ran to a corner and sat alone, tr...
A.
were too sorry to leave
B.
were both unwilling to say goodbye to
C.
felt sorry when they were in
D.
didn't know that they had to leave
【简答题】选择合适的单词填空，填序号。 Mary is a little girl. She is only five. She __ 1 __ go to school. She doesn't know how to read 2__ write. But her sister Joan is a school girl. She is ten. She 3 how to read 4 write. O...
【简答题】听力(15分) (一)听句子,选择恰当的应答语。(每个句子读两遍。) 1.A.I don't think so. B.Thank you. C.I have too much pressure about study. 2.A.You should say sorry. B.That's right. C.You are wrong. 3.A.It doesn't matter. B.Her...
【简答题】（Unit 9 Task 2）（6）A: I would like to apologize for the mistake. B: It doesn't .A. matter
【简答题】大强度作业的特点是
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