预缩砂浆是经拌和好之后再归堆放置30~90min才使用的干硬性砂浆。
参考答案:对
_____ the high price, demands for these cars are very high.
A.Because of
B.In spite of
C.In case of
D.Thanks to
从关系的对称性看,“真包含”这种关系是()。