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