计算机采用二进制数进行数据存储与计算。下列描述中正确的是______。
A. 这是由计算机中所使用的逻辑器件所决定的
B. 其好处是运算简单、实现方便、成本低
C. 该方式方便用户记忆,易于理解
D. 可以将二进制数转换成十进制数输出
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This platform would collapse if all of you ________ on it.
A. stand
B. stood
C. would stand
D. had stood
Jean doesn’t want to work right away because she think that if she _________ a job sheprobably wouldn’t be able to see her friends very often.
A. has to get
B. were to get
C. had got
D. could have got
If he __________ my advice, he would be a scientist now
A. have taken
B. took
C. had taken
D. would have taken
If Tom ________ to start out this morning, he would have got everything ready lastnight.
A. had intended
B. intends
C. have intended
D. intended