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问题 单项选择题

淬火钢回火脆性的特点是（）。

A、第一类回火脆性有可逆性

B、第二类回火脆性无可逆性

C、第二类回火脆性可通过重新加热到原来回火温度保温后快冷来消除

D、第二类回火脆性可通过重新加热到原来回火温度保温后慢冷来消除

答案

参考答案：C

填空题


Questions 41-45
· Read the memo and notes below.
· Complete the form below.
· Write a word, phrase (in CAPPITAL LETTERS) or number on lines 41-45 on your Answer Sheet.
MEMO
TO: Shirley Tang
From: Sue Hill
Here are some notes I have taken concerning a training course which the company wishes to organize. I should be grateful if you could transfer the details to the appropriate form.
Advanced Training Course, 27-30 April, to be held at Head Office.
Aspects/Problems/Issues of Product
Development precise title to be announced later but general subject title OK for now. Already 21 staff have indicated wish to attend, but this number is too large. So the total number must be cut down by 9. Conference Room will be too big, but Board Room should be ideal.
TRAINING COURSE
Commencement Date: (41) ______
Duration:(42) ______
Location. Building: Head Office
Room:(43) ______
Maximum Number of Participants: (44) ______
Subject: (45) ______
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判断题

12分钟跑是提高肌肉力量的练习。
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