运算器可以实现的主要功能是()。
A、加减运算
B、乘除运算
C、布尔运算
D、算术与逻辑运算
参考答案:D
市场上同一商品的价格有时高,有时低,其最终是由_________决定的。
A.价值
B.供求
C.人们的喜好
D.卖者的愿望
The course that Beijing University offers normally attracts 30 foreign students per year, ________ up
to half will be from America.[ ]
A. in which
B. for whom
C. with which
D. of whom