在阳极溶出伏安法中,富集电位一般控制在比待测离子峰电位()
A.负0.1~0.2V
B.负0.2~0.4V
C.正0.1~0.2V
D.正0.2~0.4V
参考答案:B
一般短日照植物由北向南引种,则生育期会()。
A.延长
B.缩短
C.不变
D.缩短或延长
What is she?()
A.She is a typist
B.She is talking to her friend
C.She is having a holiday.
D.She is my sister.