Swing的顶层容器有：Japplet, JWindow, JDialog和【 ...

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Swing的顶层容器有：Japplet, JWindow, JDialog和【】。

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【判断题】在电网容量不够大时，鼠笼式电动机常采用降压起动。降压起动时，电动机起动性能与全压起动相同。()

正确

错误

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【判断题】大容量星型联接的电动机可采用Y-降压起动。()

正确

错误

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【单选题】How does George White think of the market research?

It needs improvement.

It is perfect.

It is quite all right.

It is dissatisfying.

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【判断题】Date of the intended traveling

正确

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【判断题】自耦变压器降压起动是指电动机起动时，利用自耦变压器来降低加在电动机定子绕组上的起动电压。（）

正确

错误

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【单选题】What type of course is the following? A short course, given by a facilitator, usually involving workshops, intended to keep professionals up to date.

Refresher course

Conference

Distance course

Full-time graduate course

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【单选题】What type of course is the following? A short course, given by a facilitator, usually involving workshops, intended to keep professionals up to date. What type of course is the following? What type...

Refresher course

Conference

Distance course

Full-time graduate course

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【单选题】设D:全总个体域,L(x):x是演员,J(x):x是老师,A(x,y):x钦佩y,则命题“所有演员都钦佩某些老师”的逻辑符号化为( )。

x(L(x)→A(x,y))

x(L(x)→ y(J(y)∧A(x,y)))

x y(L(x)∧J(y)∧A(x,y))

x y(L(x)∧J(y)→A(x,y))

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【单选题】甲板边板心须连续且其厚度也是上甲板中最厚的一列板的主要原因是：I、甲板边板在上甲板中受力最大；II、承受船体横向变形力的作用；III、容易被甲板积水腐蚀