成缝器是()、旋梭、旋转线钩、带线弯针及不带线弯斜等基本成缝构件总称。A.机针 B.

题型:单项选择题

问题:

成缝器是()、旋梭、旋转线钩、带线弯针及不带线弯斜等基本成缝构件总称。

A.机针

B.梭子

C.摆梭

D.旋梭

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题型:单项选择题

在塑料模具内采用组合式型芯的优点是()。

A、模具的强度高、牢固

B、能节约贵重钢材

C、成型的塑件无拼缝痕迹

D、热处理变形大

题型:单项选择题

最大无作用剂量是

A.一群个体中不引起死亡的最高剂量
B.阈剂量
C.未能观察到任何对机体损害作用的最低剂量
D.未能观察到任何对机体损害作用的最高剂量
E.人类终身摄入该化合物未引起任何损害作用的剂量

题型:单项选择题

A图是物质M和N的溶解度曲线.B图中甲、乙试管分别盛有M、N的饱和溶液,试管底均有未溶解的M、N固体.向烧杯中加入一种物质后,甲中的固体减少,乙中的固体增加,则加入的物质不可能是(  )

A.浓硫酸

B.硝酸铵固体

C.氧化钙

D.氢氧化钠固体

题型:单项选择题

Aristotle was one of those who could found a civilization, and while he thought of education as both a social value and an end in itself, he ascribed its chief importance (21) what might be considered a third basic concept of education: to train the mind to think, (22) what it is thinking about. The key is not (23) it knows but how it (24) any new fact or argument. "An educated man," Aristotle wrote in On the Parts of Animals, "should be able to (25) a fair offhand judgment as to the goodness or badness of the method used by a professor in his exposition. To be (26) is in fact to be able to do this."
The Aristotle view of education as a (27) has become the conventionally worthy answer today (28) college presidents and other academic leaders are asked what an education should be. An educated man, says Harvard President Bok, (29) a deep breath, must have a "curiosity in (30) the unfamiliar and unexpected, an open-mindedness in entertaining opposing points of view, (31) for the ambiguity that surrounds so many important issues, and a willingness to make the best decision he can in the fact of uncertainty and doubt."
This is an approach that appears to (32) more importance to the process of learning (33) to the substance of what is learned. The very old notion of the generalist who could comprehend all subjects has (34) been an impossibility. To make matters (35) more difficult, the fields of knowledge keep changing.

A. butB. than C. as D. then

题型:单项选择题

项目组合中的组织与战略变革均大的是()。

A.舒适创新

B.拿公司赌博

C.照旧营业

D.提升能力

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