题目内容

Convenient home delivery can be ordered at a reduced price by ______.

A. going to the bookstore
B. calling the salesman
C. sending E-mail
D. using the order card

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How long do you suggest is it ______ he arrived there

A. when
B. before
C. after
D. since

If you'd like to know more about GELS you can ______.

A. watch TV
B. telephone the UK
C. buy a book about it
D. visit the Internet

曼氏迭宫绦虫幼虫可寄生于

A. 猪
B. 人
C. 两者均可
D. 两者均不可

某工程由A、B、C三个施工过程组成，划分为四个施工段，流水节拍分别为3天、3天、6天，组织异节奏流水施工，该项目工期为( )。

A. 48天
B. 30天
C. 20天
D. 21天