皮皮学，免费搜题
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搜题
【单选题】
分泌孕激素的细胞是A.
颗粒黄体细胞
B.
膜黄体细胞
C.
颗粒细胞
D.
膜细胞
E.
门细胞
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】When the youth was challenged to bring their mores up to date, it was tempted, to escape its responsibilities and retreat behind an air of naughty alcoholic sophistication and a pose of Bohemian immor...
A.
正确
B.
错误
【单选题】Cross scavenging requires the fitting of _____to prevent air or exhaust gas escape when the piston is at the top of the stroke.
A.
an exhaust valve
B.
a piston skirt
C.
a piston crown
D.
an air suction valve
【简答题】简述石膏修整机的用途和操作方法。
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