干扰细菌DNA合成的杀菌药是()
A.青霉素
B.大观霉素
C.林可霉素
D.喹诺酮类
E.四环素类
参考答案:D
— Mum! Jack has broken my toy car!
— Doesn't matter. ______.[ ]
A. One false step will make a great difference
B. God helps those who help themselves
C. Ill news travels fast
D. Accidents will happen
听觉障碍的学生最好能够进入特殊学校学习。