试题与答案

数控车床螺旋型四工位电动刀架在换刀过程中,当上刀体已旋转到所选到位时,换刀电动机反转

题型:判断题

题目:

数控车床螺旋型四工位电动刀架在换刀过程中,当上刀体已旋转到所选到位时,换刀电动机反转,完成精定位。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:双链DNA中含有的两个结构相同、方向相反的序列称为回文结构,每条单链以任一方向阅读时都与另一条链以相同方向阅读时的序列是一致的,例如5'GGTACC3' 3'CCATGG5'.

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某施工企业派出采购员张某去参加工业品展览会,并授权其采购一批外墙面砖.在展会期间,张某出示购买墙面砖的授权委托书及确定样品后,与甲建筑材料公司签订了一份外墙面砖供应合同。因洽谈顺利,张某发现该公司生产的卫生洁具质量上乘,且价格优惠,而现场正准备组织洁具供货,遂以公司名义又签订了50套卫生洁具供应合同。合同成立居,张某便随同甲建材公司送货车回到项目现场。

下列关于卫生洁具合同的表述中,正确的是( )。

A.因张某是以公司名义与甲公司签订的,所以合同有效

B.固张某签订洁具合同是无权代理,所以合同无效

C.此合同为效力待定合同,如果张某所在的施工企业追认,则合同具有效力

D.因张某有购买墙面砖的授权书,所以无论施工企业追认与否,此合同都具有效力

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题型:单项选择题

I shouldn’t let it bother me. It really doesn’t matter anyway. But it does bother me ! All those people are preparing to (21) a new century, a new millennium (千年) as well. And it just isn’t (22) !
Most of us schedule our lives by the Gregorian (23) . Our years are measured from the (24) of Christ. The first year of the first century is 1, or 1 A.D. The last year of that century is the year 100. Simple Yes! A century is 100 (25) long. A millennium is 1,000 years long, which is (26) ten centuries.
Since the last year of the first century is the year 100, the first year of the (27) century is 101. Follow that pattern, century by century and you’ll get my (28) . The year 2000 is the last year of the twentieth century. After all, (29) thousand means twenty hundreds. Twenty hundred years means twenty centuries. The year 2000 is the (30) , the final, the one that’s still here, year of the twentieth century!!!!
I know, I’m getting too (31) . But it isn’t fair, While most people will really be enjoying this coming (32) celebration, those of us in the know will be yawning. Everyone else will be (33) for the new millennium and we’ll be saying, "It’s not until next year."
I don’t agree with the (34) , "Ignorance is bliss." But in this case, perhaps it’s (35) .

A.words

B.saying

C.speech

D.definition

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