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【单选题】
食品等保存的方法有很多,其原理不完全相同。下列哪项方法的原理与其他三项不同 ( )
A.
在地窖中保存蔬菜
B.
鱼肉腌制保存
C.
种子晒干保存
D.
水果低温保存
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【判断题】离心式水泵按照泵的构造分为分段式离心式水泵和整体式离心式水泵。
A.
正确
B.
错误
【多选题】离心式通风机叶片出口安装角有( )。
A.
前向叶片
B.
径向叶片
C.
后向叶片
D.
变向叶片
【简答题】离心式水泵启动前,入口门应______、出口门关闭,轴承室内油位在______间。
【单选题】Which of the following represents the best justification for the departure from the historical cost principle that results when lower-of-cost-or-net realizable is used?
A.
It is easier to keep track of market value than it is to keep track of cost as market value is available from any supplier.
B.
Cost loses its relevance for the determination of cost of goods sold if the cost of inventory has been incurred in an earlier accounting period.
C.
The balance sheet valuation of inventory is the most important consideration in the preparation of financial statements.
D.
The loss in utility (revenue-producing ability) that results from a decline in the market value of inventory should be charged against revenues in the period in which it occurs.
【判断题】离心式水泵按照导叶分为导叶离心式水泵和无导叶离心式水泵。
A.
正确
B.
错误
【简答题】What is the result from the historical change of English?
【单选题】离心式水泵属于()水泵
A.
叶片式水泵
B.
容积式水泵
C.
射流泵
D.
螺旋泵
【简答题】From the historical development of foreign language teaching in China, what is the main method used in each period?
【简答题】From the historical overview of the English vocabulary, the language spoken from 1150 to 1500 is called ____English.
【单选题】离心式水泵按照叶片数目进行分类,其中表述不正确的一项是()。
A.
多级离心式水泵
B.
二级离心式水泵
C.
单级离心式水泵
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