问题
单项选择题
预制构件的预埋吊环应选用( )。
A．Ⅰ级钢筋
B．Ⅱ级钢筋
C．Ⅲ级钢筋
D．Ⅳ级钢筋
答案
参考答案：A
解析：本题考核点为建筑中预压力混凝土常用钢筋的选择。应选择强度大的Ⅰ级钢筋， I级钢筋半圆弯钩增加长度为6.25d；直弯钩增加长度为3d；斜弯钩增加长度为4.9d，故其强度大。
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预制构件的预埋吊环应选用( )。
A．Ⅰ级钢筋
B．Ⅱ级钢筋
C．Ⅲ级钢筋
D．Ⅳ级钢筋
参考答案：A
解析：本题考核点为建筑中预压力混凝土常用钢筋的选择。应选择强度大的Ⅰ级钢筋， I级钢筋半圆弯钩增加长度为6.25d；直弯钩增加长度为3d；斜弯钩增加长度为4.9d，故其强度大。
| 阅读理解 | |||
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| 1. If you choose the Learning Computers course, you'll have classes __________. | |||
| A. from Monday to Friday B. on Wednesday and Saturday C. on January 4,7,12,15 D. in the afternoon every day | |||
| 2. From the ads we know that Zhang Hua __________. | |||
| A. is a teacher from Beijing University B. has no experience in the computer field C. can type very well D. comes from an English-speaking country | |||
| 3. If you choose the Typing course, you __________. | |||
| A. should have a test first B. needn't bring your own paper C. can't learn at your own speed D. should pay $ 115 | |||
| 4. Mr.Black works in the day and only has time in the evening, he can only choose the __________ course. | |||
| A. Learning Computers B. Typing C. Language Study D. None of the above | |||
| 5. The Language Study course will last __________. | |||
| A. twelve hours B. two weeks C. three months D. three weeks |