Each NCS woks as a type of（）, assistin

1、A(n) （） is a special type of valve whi

A(n) （） is a special type of valve which prevents the passage of steam but allows condensate to pass.Acheck valveBnon-return valveCsteam trapDquick closing tra

2、The efficiency of a flash type evapora

The efficiency of a flash type evaporator can be increased by（）Alowering brine discharge densityBdecreasing the absolute pressure of each stageCincreasing the saltwater feed heater temperatureDincreasing the pressure at the spray pipe

3、Which type of precipitation is a produ

Which type of precipitation is a product of the violent convection found in thunderstorms（）.ASnowBFreezing RainCHailDSleet

4、As we know, blood types A and B cannot

As we know, blood types A and B cannot receive AB, but AB may receive A or B. Type O can give to any other group; hence it is often called the（） donor.AgeneralBpopularCuniversalDcommo

5、For which type of connection should a

For which type of connection should a straight-through cable be used?（）A switch to switchB switch to hubC switch to routerD hub to hubE router to PC

6、A（）is a special type of parent company

A（）is a special type of parent company that exercises little operating control over the subsidiary，merely“holding”its stock as an investment.APublic companyBholding companyCfirmDconglomerate