硝酸纤维类胶片等物质缓慢分解,温度上升时,要立即()。
A.用水降温
B.用泡沫覆盖
C.用二氧化碳冷却
D.搬出库房外,散热摊凉
参考答案:D
What an important part the Internet_______ in our life! One can hardly imagine____ life would be like without it.
A.has; how
B.is; however
C.uses; what
D.plays; what
公猫去势时,切口应在阴囊的
A.颈部
B.底部
C.左侧
D.右侧
E.阴囊前方