【单选题】The people in the office suddenly started working because________.
A.
they saw a stranger in the office
B.
their morning break was ended
C.
no one wanted to talk to Marie
D.
the boss was about to arrive
【简答题】用于注射用灭菌粉末的溶剂或注射液的稀释剂( )。
【单选题】There is evidence that______.
A.
man has been growing taller over the past 500 years
B.
man has got stronger eyes than he ever had
C.
man's hair is getting thinner and thinner
D.
man's limbs are getting weaker because he tends to make less use of them
【简答题】主要用于注射用灭菌粉末的溶剂或注射液的稀释剂
【单选题】设〈 G,* 〉是群,且 |G|>1 ,则下列命题成立的是 ( )
【单选题】下列钠盐中含S-S单键的是 ________。
【判断题】灭菌注射用水才能用于注射用灭菌粉末的溶剂或注射液的稀释剂。()
【多选题】关于循环群,下列说法正确的是( )。
A.
循环群<a>是交换群,即循环群中必有a^i乘以a^j等于a^j乘以a^i,其中i,j∈Z。
C.
循环群<a>中,a的一个方幂是生成元当且仅当a的这个方幂的阶等于a的阶。
D.
若G为群,a∈G,a的阶等于7,则a生成的循环群<a>的阶也等于7。
【单选题】Music is , and I like my music teacher, too. He’s .
【单选题】Neither my father nor my mother ______ rock music. They think that it's too ______. [ ]