作用于细菌静止期的杀菌药是
A.头孢菌素
B.链霉素
C.庆大霉素
D.青霉素
E.多黏菌素
参考答案:B,C,E
计算:
(1)-22+(-3)×|-4|-(-3)2÷(-2);
(2)-x-2(2x-3)+(3x+5)。
I must go there earlier. John has suggested that I _____ an hour before the discussion begins.
A.go
B.shall go
C.will go
D.would go