汽压机反飞动阀是()
A.风关阀
B.风开阀
C.一般调节阀
D.两位阀
参考答案:A
According to the speaker, what do people often think about astronomers a. They spend most of their time looking through telescopes. b. They are constantly analyzing data. c. They often live near observatories. d. They devote a lot of time to theoretical problems.
行政复议机关审议案件的法律依据包括()。