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单项选择题

置顶购买失败的情况是（2.0）分选项（）

A.页面已满
B．品类不支持
C．帖子排期
D．帖子信息不正常
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未知题型
HTK499光子探测系统，探头采集点的间隔距离是与车速成正比的（）
单项选择题
A short "informal" lab report often provides a three-part introductory overview. The three steps are listed randomly as follows: explaining the specific question or task arising from that problem that you will be dealing with explaining why the report is being submitted or what it is intended to do stating the general problem first to give the reader a context or “big picture” Which of the following restores the correct order of the steps in the overview?
A、1, 2, and 3.
B、2, 3, and 1.
C、3, 1, and 2.
D、1, 3, and 2.
A.
B.
C.
未知题型
HTK-499单光子探测站系统中，用于设定加热功率的挎接开关位于光子控制箱的控制板上（）
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