混凝土立方体抗压强度应达到( )的保证率。
A.90%
B.95%
C.98%
D.100%
参考答案:B
There is _________ news about this movie star in the newspaper. Where can I get some?
A.many
B.a few
C.a lot
D.little
诗句“南国春意浓,北国正冰封”反映了我国.( )
A.经度跨度大
B.东西跨度大
C.海域跨度大
D.纬度跨度大