离心泵启动前,()要先灌满水。
A、出水管
B、进水管
C、泵壳和进水管
D、泵壳和出水管
参考答案:C
下列规划属于需要编写“有关环境影响的篇章或者说明”范围的是( )。
A.省级及设区的市级乡镇企业发展规划
B.设区的市级以上农业发展规划
C.设区的市级以上土地开发整理规划
D.设区的市级以上土地利用总体规划
The work was difficult, but Tom’s expression showed that he would finish it in time.
A.stubborn
B.determined
C.concerned
D.surprised