神经细胞的静息电位和动作电位均可通过仪器测量。A、B、C、D表示测量神经纤维膜内外电位变化,不可能出现的结果是[ ]
A.
B.
C.
D.
答案:B
At the beginning of a speech, it is very important to grab the audience's attention and make
them interested in ______ you have to say.[ ]
A. which
B. what
C. that
D. who
含薄荷油的化妆品可引起()
A.神经系统毒作用
B.心血管系统毒作用
C.生殖系统毒作用
D.造血系统毒作用
E.结膜或角膜炎症