单项选择题
预应力筋张拉机具及压力表应定期维护。张拉设备和压力表应配套标定和使用,标定期限不应超过三年。
判断题预应力筋张拉机具及压力表应定期维护。张拉设备和压力表应配套标定和使用,标定期限不应超过三年。
具有ATP酶活性,属于分子马达的肌丝成分是( )。A.肌球蛋白B.肌动蛋白C.肌钙蛋白D.原肌球蛋白
单项选择题具有ATP酶活性,属于分子马达的肌丝成分是( )。
The speaker was eating Dongpo Beef in classroom when a ...
判断题The speaker was eating Dongpo Beef in classroom when a group of visitors came in to check out the oil paintings on the ceiling of the classroom.