分子结合水是依靠()形成的分子水膜把颗粒紧密的黏结在一起,它对物料球的强度具有决定意义。
A.电分子力
B.重力
C.表面力
参考答案:A
填入所缺单词,完成短文。
Beijing is a nice place. There are seasons in a year. In , it's warm and sunny. In ,
it's hot. In , it's always cool and windy. In , it's cold. I like cool days and bright sunshine, so
I like Beijing's fall best.
德意志宪法与1787年宪法相比,最大的不同点在于
A.民主化程度
B.宪法的阶级性质
C.内容的全面性
D.实施程度