选择题：24.His speech was warmly received. It was several

题目内容：

24.
His speech was warmly received. It was several minutes before the applause _______.　
(A) died down
(B) died of
(C) died out
(D) died off

参考答案：

一物体从某一确定的高度以初速度水平抛出，已知它落地时的速率为，则它的运动时间是 C:√Vt-Vo/

一物体从某一确定的高度以初速度水平抛出，已知它落地时的速率为，则它的运动时间是 C:√Vt-Vo/g

5.The classroom was silent _____ the busy scratching of pens on paper.　(A)bes

1.You’d better add them up. I’m not good at ____.　(A)figures(B)characters(

1.(2分)浇筑大体积的砼后，应重视养护工作，即勤于浇水覆盖。

4.低合金钢筋两端采用螺杆锚具时，预应力的钢筋按预留孔道长度减( )螺杆另行计算 A.0.20m B.0.25m C.0.30m D.0.35