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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】( )的作用是控制系统中的压力基本恒定,实现稳压、调压或限压。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
溢流阀
B.
节流阀
C.
顺序阀
D.
单向阀
【单选题】Amphibious vehicles, those that can move on both land and water, have been in use for a number of years, but while most of them were fairly fast on land, they moved quite slowly when they were functio...
A.
the sidewall ACV
B.
Mountbatten Class hovercraft
C.
Cockerell’s ACV
D.
Sedam N500