换向阀的操纵方式可分为()、()、()、()、()按照进出口通路数可分为()、()、()、()
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换向阀图形符号中P表示(),T表示(),A、B分别表示()
在二位换向阀中,()位为常态位三位阀中,()位为常态位
[音频]To get a driver's license, you must take _____1_____ tests. The first test is the vision test. This test _____2_____ to see if you have to wear glasses. The second test is ____3_____. It checks your knowledge of highway and traffic regulations. _____4_____ the written test, you receive an instruction permit. The last test you have to take is a road test. This checks your _____5_____.
发票的本文不包括( )。
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