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【多选题】
在下列哪些立体表面可以取到直线?A.
B.
棱锥
C.
圆柱
D.
圆锥
E.
圆球
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】更换动力电源插接件应注意:()。
A.
拆下维修开关时需要佩戴绝缘手套
B.
拆下维修开关把手前，务必将电源开关置于O错错位置（关闭SMR）以确保安全
C.
维修开关把手拆下后摇放在口袋内携带，以确保安全
D.
包括以上三项
【单选题】—My nephew will come tomorrow. — But I’d rather he _____ the day after tomorrow.
A.
came
B.
is coming
C.
will come
D.
had come
【简答题】单位阶跃函数的拉普拉斯变换结果是什么？单位斜坡函数的拉氏变换结果是什么？
【单选题】在windows中,对桌面上的图标( )。
A.
可以用鼠标的拖动打开一个快捷菜单对它们的位置加以调整
B.
只能用鼠标对它们拖动来调整位置
C.
只能通过某个菜单来调整位置
D.
只需用鼠标在桌面上从屏幕左上角向右下角拖动一次，它们就会重新排列
【单选题】听力原文：M: May I help you? W: Yes, my nephew is graduating from college next week and I'd like to get him a nice gift. M: How much would you like to spend for the gift? W: Well, I usually spend about 20 ...
A.
In a post office.
B.
In a store.
C.
In a library.
D.
In a laboratory.
【单选题】My nephew ______ from home for three days now, and I am beginning to worry about his safety.
A.
has been missed
B.
was missed
C.
has been missing
D.
had been missing
【单选题】根据牙松动的方向确定II度牙松动是。
A.
颊舌向松动
B.
近远中向松动、
C.
颊舌向和近、远中向松动
D.
颊舌向、近远中向和垂直向松动
E.
颊舌向松动、垂直向松动
【单选题】My nephew has been to Iraq and Iran as well as all of Europe. By the time he's twenty-five, he ______ almost everywhere.
A.
will be
B.
will have been
C.
would have been
D.
would be
【简答题】The boy who just went out is my nephew.
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