A:法国
B:苏联
C:南斯拉夫
D:中国
①突出前膜 ②递质(如乙酰胆碱) ③突触间隙 ④突触后膜 ⑤轴突.
- ______ your brother?
- He is a student.( )
25×0.2=____10.52+0.08=____ 0÷49 =____ 1÷0.01−0.01 =____
17×910÷17×910 =____ 2.4×38 =____0.012=____
(58−0.125)×5 =____1-1 ÷6 =____