【B17】A．whichB．at whichC．on whichD．in which

A.marriage

B.remarriage

C.divorce

D.both A and B

This book is designed for the learners ______ native language are not English.

A) whose B) which C) who D) what

His mother works at the market ______ sells vegetable and fruits.

A．where

B．in which

C．at which

D．which

It wasn't such a good job ______ she had read about in the advertisement.

A) like B) which C) as D) what

A.回顾性队列研究

B.前瞻性队列研究

C.前瞻性对照研究

D.回顾性病例对照研究

______ you choose, make sure that it is a good one.

A. What

B. Wherever

C. Whichever

D. Which

A．They tend to forget it.

B．They will not consider it.

C．It does not seem worth their while.

D．They take it for granted.

He is clever and hardworking, ______he is honoured with the title of model worker.

A．of which

B．for which

C．of what

D．for what

A.Certificate issuer and the Digital Signature Algorithm identifier

B.User's private key and the identifier of the master key code

C.Name of secure channel and the identifier of the protocol type

D.Key authorization and identifier of key distribution center

以下定义中正确的是( )。

(A)enum color{"red","yellow","blue","white","black"}

(B)enum color{'red','yellow','blue','white','black'}

(C)enum color {red yellow blue white black}

(D)enum color {red=4,yellow,blue=8,white,black}