A.are the source of true human values in the future
B.can work with knowledge to make the world better
C.are similar to the skills of human logic and analysis
D.can be learned from textbooks and in classrooms
[单选题]What is the function of the chillers in a traditional air-conditioning syst
[单选题]The pressurized air is usually cooled to increase the charge air ().A . viscosityB . densityC . velocityD . electricity
[单选题]21. This is ________ room. The twin sisters like it very much.A. Lucy's and Lily'sB. Lucy's and LilyC. Lucy and Lily'sD. Lucy and Lily
[单选题]What is one problem with traditional air-conditioning systems?A.The chemica
[单选题]_____hissurprise, the manager found nobody in the meeting room.A.AtB.ToC.Fo
[单选题]During the SARSperiod,it is especially important to [ventilate] the room.A.
[单选题]22. We can see ________in the room.A. one bedB. two bedsC. Lucy's bedD. Lily's bed
[单选题]___ his surprise, the manager found nobody in the meeting room.A.AtB.ToC.Fo
[单选题]Don’t forget ________ the window before leaving the room.A.to have closedB.
[单选题]The thunder [scared]the little girl who is sleeping in the room.A.frightene