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【简答题】
Choose the prepositional phrase you think best fits into the gap in the sentences below. at last in a whisper in debt in his pyjamas in pencil in public on my own on the phone out of danger out of luck We all laughed when he came to school ___________. I don't need any help. I'll manage ___________. Jane is much better now. The doctor says that she is ___________ at last. No wonder he looks worried. Someone told me that he is _________ to the bank for more than four thousand pounds. You can't talk to her now. She's still ________ , but I will ask her to call you back. Because she didn't want anyone else to hear she spoke to him ___________. The journey home took 26 hours so you can imagine how we felt when we arrived home _________. All the answers have to be written _________ so they can be marked by computer. He still very nervous when he has to speak __________. I'm afraid you're ________ , there aren't any tickets left.
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举一反三
【多选题】合金元素在钢中的作用是?
A.
强化铁素体
B.
形成合金碳化物
C.
提高强度和硬度
【单选题】麻花钻头的顶角影响主切削刃上切削抗力的大小,顶角( )则轴向抗力愈小。
A.
愈大
B.
愈小
C.
不变
D.
以上都不是
【单选题】麻花钻头的顶角影响主切削刃上切削抗力的大小,顶角(    )则轴向抗力越小。
A.
越大
B.
越小
【多选题】合金元素在钢中的作用有( )。
A.
形成合金铁素体
B.
形成合金碳化物
C.
提高钢的淬透性
D.
提高耐回火性
【简答题】合金元素在钢中的作用
【简答题】论述下合金元素在钢中的作用。
【单选题】麻花钻头的顶角影响主切削刃上切削抗力的大小,顶角越大则轴向抗力( )。
A.
变大
B.
变小
C.
不变
D.
无明显变化
【判断题】合金元素在钢中的作用是合金元素可以 提高 钢的力学性能
A.
正确
B.
错误
【单选题】你哥哥想在婚礼上穿一件更上档次的西服,于是他来到一家裁缝店,量尺寸亲自选料,10天后他拿到了满意的西服。请问,此过程的供应链属于以下哪一类?
A.
MTO (按订单生产)
B.
MTS (按库存生产)
C.
ETO (按订单设计)
D.
以上都不是
【多选题】合金元素在钢中的作用是:
A.
固溶强化和韧化
B.
形成碳化物,提高强度和耐磨性,
C.
细化晶粒
D.
提高钢的淬透性,
E.
提高回火稳定性,
F.
产生二次硬化以及抑制第2类回火脆性
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