图象部分不透光而空白部分透光的胶片是()图胶片。
A、黑
B、白
C、阴
D、阳
参考答案:D
---Is there a hotel in the neighborhood?
---Yes, ______.
A.it is
B.I am
C.there is
D.there are
轨道铺设完成后,预应力混凝土梁的竖向残余徐变变形应满足哪些限值?