转向助力装置的安全阀是( )。 A. 限制转向油泵的最大的压力 B. 保护油泵及装置中其它机构不致过载而损坏
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举一反三
【单选题】{ In a half-wave rectifier circuit, for a typical real silicon diode (not ideal diode) at room temperature, the output voltage is less than the source voltage. This is because ( ). }
A.
There is no voltage drop across the diode.
B.
There is a voltage drop (approximately 0.7V) across the diode.
C.
The diode is in the reverse-bias region.
D.
There is a voltage drop (approximately 6V) across the diode.