当电力系统发生单相接地短路故障时,光伏发电站低电压穿越考核电压为并网点()。
参考答案:相电压
_____ a solution to the problem of water shortage, we have to put all our efforts together. [ ]
A. To work out
B. Working out
C. Work out
D. Being worked out
对某场地粉土地基进行标准贯入试验,锤击数的实测值=8,孔隙比=0.9,饱和度=0.9,据此可确定该粉土的( )。
A.密实度为密实,湿度为饱和
B.密实度为中密,湿度不能确定
C.密实度为松散,湿度为饱和
D.密实度为稍密,湿度为很湿