搜题请搜索小程序“爱下问搜题”
问题 单项选择题 B1型题

频率最慢的脑电波是（）。

A.α波

B.β波

C.θ波

D.δ波

E.α波阻断

答案

参考答案：D

选择题
— I'm sorry, but I don't quite follow you. Did you say you wanted to return on September 20?
— Sorry, I _____ myself clear. We want to return on October 20.

A. hadn't made
B. wouldn't make
C. don't make
D. haven't made
查看答案
单项选择题

薄壁细胞中常含菊糖的科是

A.桔梗科

B.豆科

C.蔷薇科

D.茄科
查看答案