如图所示：一玻璃管中注满清水，水中放一软木做成的小圆柱体（圆柱体的直径略小于玻璃

______ the program, they have to stay there for another two weeks.  [ ]

A. Not completing  

B. Not completed  

C. Not having completed  

D. Having completed

选出正确的词，并写在横线上。

1. —Have you ever been to Europe?    —No, but I ______ (have been/went) to Africa last year.

2. —Have you ever been to my house?   —No. But I'm coming to your party ______ (tonight/this night).

3. Has Victor ______ (been ever/ever been) to China?

4. In future, people will ______ (spend/waste) a long vacation every year.

5. He is an ______ (exchanged/exchange) student in this school.

根据《建筑抗震设计规范》(GB 50011—2001)的规定，存在液化土层的低承台桩基抗震验算，对一般浅基础，( )计入承台周围土的抗力或刚性地坪对水平地震作用的分担作用。

A．应

B．不应

C．不宜

D．宜

磨料磨损会在（）速度下发生。

A、高

B、中

C、各种

二灰碎石基层施工时，应注意做到（）。

A.严禁用薄层贴补法进行找平

B.必须保湿养护，在铺封层或面层前，应封闭交通

C.常温下养生期一般为14天

D.碾压时应洒大水吊浆碾压

E.拌合好的混合料含水量宜略小于最佳含水量