有些零件在能自由膨胀的同时,还要求()。

题型:填空题

问题:

有些零件在能自由膨胀的同时,还要求()。

考点:发电工(动力工)发电工(动力工)中级发电工(动力工)中级题库
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肠道致病菌培养常用的选择性培养基是()

A.沙氏培养基

B.SS培养基

C.巧克力血琼脂培养基

D.改良罗氏培养基

E.BCYE培养基

题型:填空题

“削铁如泥”通常用来形容某种刀具品质优良,从科学的角度来讲,说明制作刀具的材料________比铁大。

题型:填空题

如图,在一根长11厘米,外圆周长6厘米的圆柱形柱体外表面,用一根细铁丝缠绕,组成10个螺旋,如果铁丝的两端恰好落在圆柱的同一条母线上,则铁丝长度的最小值为()。

A.61厘米

B.

C.

D.

题型:填空题

由于焊接技术的进步,许多原来用()、()、()等制造的构件改为();因焊结是(),所以又产生了(),因此必须恰如其分地予以考虑。

题型:填空题

Beijing: The United States and North Korea had their first ________in four months here this afternoon as part of the ________negotiations on how to end North Korea’’s nuclear program, but diplomats played down prospects for________.James A. Kelly, assistant________, and Kim Yong II, North Korea’’s deputy foreign minister, met ________of formal discussions, ________on direct dialogue that began after a stormy meeting ________in which North Korea warned that it was moving quickly to ________nuclear arms.The Bush administration had insisted ________that it would only hold talks with North Korea ________because, it argued, only ________pressure would persuade North Korea to________. It got its way when North Korea dropped its insistence on ________and agreed, after extensive efforts by China, to hold unusual simultaneous negotiations with ________,________,________and ________as well as the United States.Though Bush administration officials had not ________talking privately with the North Koreans during________, the fact that Mr. Kelly and Mr. Kim met on the first day was seen as a sign of ________by the American side.

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