设f(x)在x=2处可导,且f'(2)=2,则
等于( ).
A.
B.1
C.2
D.4
参考答案:B
解析:本题考查的知识点为导数在一点处的定义.
可知应选B.
皮肤病中若出现剧痒难忍,浸淫如虫蚁游走,具有传染性,引起病因为()。
A.风
B.湿
C.热
D.虫
E.毒
The shop assistants were fired as they were _________ of cheating customers.
A.accused
B.charged
C.blamed
D.caught