简述如何选择水泵?
参考答案:由水泵的流量,扬程查水泵性能表(或曲线)即可确定其型号。
根据语境,用恰当的语言完成对话。
A: Hello,Kangkang. How beautiful your new bike is!
B:小题1:____________________________________________
A: Where is it made ?
B:It is made in Shanghai.
A:I also want to buy one.小题2:_________________________________________
B:In Huangshang Supermarket. And there are many different colors.
A:小题3:____________________________________________________________-
A:I like black best.小题4:_____________________________________________
B:About 160 yuan.
A:The price is OK.Well,would you like to go to the shop with me on National Day?
B:小题5:_________________________.I will be free that day.
危险化学品安全技术
石油天然气井下深未超过( )m时,不应检测井内的枪身或爆炸筒。
A.100
B.200
C.300
D.500