在无线传声器接收部分中，信号()。
A. 要先通过A/D转换
B. 要最后通过D/A转换
C. 要先通过V/U高频放大
D. 不通过V/U高频放大
Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the
A. cooling water leaving each cylinder
B. fuel oil entering the injector
C. exhaust gases at various locations
D. lube oil at the bearing supplies
作为一名入党积极分子，请你谈谈为什么要学习党章以及如何学习好党章？
Coolers are used for cooling ()
A. only water
B. only oil
C. water or oil
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