下列车行道路中,哪一种路面须设伸缩缝()
A. 现浇混凝土
B. 沥青表面处理
C. 预制混凝土方砖
D.沥青混凝土
参考答案:A
解析:
混凝土路面必须设置伸缝和缩缝。
调节粗准焦螺旋使镜筒大幅度下降时,眼睛要看着目镜以免目镜压碎玻片标本______.
句型变化
1.The question is so hard that we can't understand it.
1) too... to句式_____
2) enough句式_
2.He didn't come here yesterday because of the heavy rain. (变为复合句)
He didn't come here yesterday _____.
3.Get up early, or you'll be late for the train, (变为条件状语从句)
_____, you won't be late for the train.
4.If you speak more, you'll speak better. (同义句)
____you speak,____you'll speak.
5.Wherever you go, I'll miss you for ever. (同义句)
__you go, I'll miss you for ever.