What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?

A．lube oil sludge accumulating in it

B．dirt and scale etc , formed on the surfaces

C．deformation of the tubes and the shell or the plates

D．lube oil leakage into sea-water side

[主观题]Themostbasicreasonwhydialectsshouldbepreservedisthatlanguagehelpsto______acultureA．)retainB)relateC)remarkD)review

[主观题]In OOD what is the reason when you create a Sequence diagram?__

[单选题]What is the most advantage of the lean-combustion different from the routine combustion?A．Continue runningB．Well combustionC．Higher peak temperatureD．Lower holding time of Maximum temperature

[单选题]B．yalmostanymeasure,thereisaboominInternet-basedinstruction.Injustafewyears,34percentofAmericanuniversitieshavebegunofferingsomeformofdistancelearning(DL),andamongthelargerschools,it’scloserto90percent.Ifyoudoubtthepopularityofthetrend,youprobablyhav

[单选题]What is the most important in the logistics information system? （）A . EDIB . POSC . GPSD . Bar Code

[单选题]24． The reason why most plants can’t grow on the sandy beach is thatA． there isn't enough sunlightB． there is too much waterC． it is too crowded thereD． it has little food for plants

[单选题]What is the most appropriate title for the passage?A．) Dangers of Earthquakes.B．) Earthquake Belts and Prediction.C．) Earthquake Prediction and Control.D．) Earthquake Engineering in California.

[单选题]What is most likely to be discussed in the paragreh that follows?A．Steps to improving water use managet.B．Ways tor redjuce the costs of builing dams.C．Measured to dmal with worldwide water shortages.D．Appmihes to handling the pressure on water supply

[单选题]What is most probably a “town guide “in the conservatism?A． A bookB． A personC． A shop

[单选题]What will the author most probably discuss in the paragraph that follows?A． causes for the parent –teen conflictsB． Examples of the parent –teen war.C． Solutions for the parent –teen problemsD． Future of the parent-teen relationship