负责计算机内部之间的各种运算和逻辑运算的功能,主要是由()来实现的。
A.CPU
B.主板
C.内存
D.显卡
参考答案:A
—Could you tell me __________ yesterday?
—Because my bike was broken on my way here.
A.why you came late
B.why do you come late
C.why you come late
D.why did you come late
当x→0时,x2-sin x是x的( )。
A.高阶无穷小
B.等价无穷小
C.同阶无穷小,但不是等价无穷小
D.低阶无穷小