混凝土箱梁终张拉前的三控:强度达到(),弹模达到(),龄期达到10天。

题型:填空题

问题:

混凝土箱梁终张拉前的三控:强度达到(),弹模达到(),龄期达到10天。

考点:土木建筑工程预制梁施工预制梁施工题库
题型:填空题

下列短文的划线部分是错误的,请将其正确答案书写在后面横线上。

Nowadays people use the phone to talk with other almost anywhere on the world. But when you use the phone, you can't see the person you are talk with. This may change in the near future. Today some people are using a kinds of telephone called the picture Phone or videophone(可视电话).  With it, two people who is talking can see each other. Picture phones are useful if you want to show something to a person you're calling. They may have other uses in the future. One day you may be able to ring for a library and ask read a book. You'll be able to read the book right over your picture phone. Or you may be able to do some shoping through your picture phone. If you want to buy something, you can calling the shop. People at the shop will show you the thing right over the phone. You'll be able to shop all over the world and you needn't leave your room.

题型:填空题

A是B的倍数,C是B的因数.A、B、C三个数的最大公因数是(  )

A.A

B.B

C.C

D.AB

题型:填空题

病毒复制的隐蔽期通常处于哪个阶段()

A.吸附

B.穿入

C.脱壳

D.生物合成

E.装配与释放

题型:填空题

工程施工前,( )需向承包人进行设计交底。

A.委托人

B.设计人

C.工程师

D.发包人

题型:填空题

按《国际危规》的分类,以下属于第4.1类的是()。

①黄麻;②铝粉;(有涂层的)③铁屑;④赤磷;⑤乒乓球;⑥镁粉;⑦钠。

A.①②③④⑤⑥

B.②④⑤⑥⑦

C.①②④⑤⑥

D.①②③⑥⑦

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