橡胶或聚氨酯缓冲器失去弹性或破损时应()。
A、修复
B、调整
C、拆卸
D、更换
参考答案:D
摄碘率升高,高峰提前()
A.甲状腺功能亢进
B.地方性甲状腺肿
C.亚急性甲状腺炎
D.甲状腺癌
E.甲低症
Prices of the basic necessities of life have been going up sharply since word came that war would
________between the two countries soon.[ ]
A. watch out
B. break out
C. die out
D. give out