题目内容

油液粘度因温度升高而减小，因压力增大而增大。

A. 对
B. 错

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适用于含纤维、微小固体颗料等介质的阀是（）。A．B． C． D．

A. 蝶阀
B. 旋塞阀
C. 球阀
D. 节流阀

阀门Z944T-1,DN500代表的连接方式是（）。

A. 法兰连接
B. 焊接连接
C. 热熔连接
D. 螺纹连接

What is advertising?Advertising is a means of _ with the users of a product or service.Advertisements are messages paid for by those who send them and are intended to or __ people who receive them.

What are the purposes of advertising?-Make customers ___ of your product or service.-Convince customersthat your company's product or service is right for their_ .-Create a _ for your products or services.-Enhance the ___ of your company.