公路水泥混凝土路面配合比设计在兼顾经济性的同时,应满足______等三项技术要求。
A.弯拉强度
B.抗压强度
C.工作性
D.抗拉拔力
E.耐久性
参考答案:A,C,D
— Dr White has got plenty of information about UFO. He's promised to offer it to me.
— I have as much. Would you like to have mine____? [ ]
A. as well
B. as possible
C. so far
D. if so
根吸收水和无机盐的部位主要是根尖的( )
A.根冠
B.伸长区
C.成熟区
D.分生区