客房用品主要分为两大类,即一次性消耗品和()消耗品
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Valve overlap is the period during which ().
A. the inlet valve is open
B. the exhaust valve is open
C. both valves are closed
D. both valves are ope
利率市场化使商业银行匹配资产和负债的手段变得单一。
A. 正确
B. 错误
《秋水》开头有一段河伯和海景的描写,其主要作用是()。
A. 赞美河海的雄伟壮观
B. 表现作者的宽广胸怀
C. 增强行文说理的磅礴气势
D. 暗示两种不同的认识境界