换热器检修更换下来的设备备件、换热器芯子等,可以再利用的,要及时组织()。
参考答案:修复备用
一个从地面竖直上抛的物体,它两次经过同一较低a点的时间间隔为Ta,两次经过另一较高的b点的时间间隔为Tb,则ab两点间的距离为( )
A.18g(Ta2-Tb2)
B.14g(Ta2-Tb2)
C.12g(Ta2-Tb2)
D.12g(Ta-Tb)
Water makes up some 70 percentage points of the body, and drinking enough water—either tap water or expensive mineral water—will ensure that the body is properly lubricated and flushed.
A.per-cent
B.per capita
C.percent
D.percentage