关于混凝土立方体抗压强度测定的说法,正确的是()。
A.边长为100m的标准试件
B.养护温度20±3℃
C.养护相对湿度90%以上
D.养护28d
参考答案:D
Mr Brown always makes his class _______ and keeps his students _______ in class. [ ]
A. alive; interesting
B. lively; interesting
C. alive; interested
D. lively; interested
咽喉肿痛首选:()
A.少商
B.少泽
C.少冲
D.关冲
E.商阳