问题
单项选择题
皮带接头的角度一般是（）度。
A．30-40
B．40-50
C．40-60
答案
参考答案：C
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皮带接头的角度一般是（）度。
A．30-40
B．40-50
C．40-60
参考答案：C
| 根据所给的调查表，用适当的词完成后面的短文。 | ||||||||||||||||||||
All students =100% Most students=51%～99% Some students=1%～50% No students=0% | ||||||||||||||||||||
| Here are the results of students activity survey at No. 18 High School. 1 students do homework every day. 2 students do homework three or four times a week. 3 students do homework once a week. As for surfing the Internet, 4 students surf the Internet every day. 5 students surf the Internet once a week. Some students surf the Internet 6 7 8 9 a week. The results for "watch TW' are interesting. 10 . students watch TV every day. 11 students watch TV once a week. 12 students watch TV three or four times a week. | ||||||||||||||||||||