第8题: [单项选择]It is important to use only pure lead and to choose a thickness of wire which is greater than the normal allowable clearance but （） this amount. A. not less than twice B. greater at least twice than C. not greater twice than D. larger three times than 参考答案:C
A. A child should be named after his or her father. B. A child should be named after a film star. C. A child should be given a number rather than a name. D. A child should be named after his or her mother. 参考答案:C
