下载APP
【判断题】
超高性能混凝土(UHPC)也称活性粉末混凝土,是最新的水泥基工程材料,主要材料有水泥、石英砂、硅灰和纤维等。其强度比GRC高,抗弯强度可达20mPa以上,不衰减,耐久性好,造价高。
A.
正确
B.
错误
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】When stars like our Sun die, they bloat to become red giants and then eject gigantic clouds of gas and dust into space. Increasingly, however, scientists found themselves at a profound loss to explain...
A.
explain-the possible way of death of our Sun.
B.
show the two types of red giants.
C.
discuss on the way of red giants to become white dwarfs.
D.
explore the origin of life.