B．alloons float in the air_________ boats do on the sea.

A． just as

B． when

C． that

D． where

[单选题]Storage batteries on T-Boats must be located（）.A . in sight of the main engine(s)B . in a tray lined with suitable material that resists damage from the electrolyteC . in locked closets with restricted ventilationD . near the bilge to lower the cente

[单选题]Compressed air is supplied by air compression to （）.A . the air receiversB . the starting valvesC . the cylinder coversD . the distributor

All the people in the stadium cheered up when they saw hundreds of colorful ball

In an air conditioning system, moisture is removed from the air by________.A. fi

To reduce weight, plastic has taken （） of iron and steel in making boats.A. its

[单选题]有以下程序 float fl(float n) { return n*n； } float f2(float n) { return 2*n；} main() {float(*p1)(float)，(*p2)(float)，(*t)(float)，y1，Y2； p1=f1； p2=f2； y1=p2(p1(2.O))； t=p1； p1=p2； p2=t； y2=p2(pl(2.0))； printf("%3.0f，%3，Of/n"，y1，y2)； } 程序运行后的输出结果是A．8，16B．

[单选] The figure that the volume of air at BDC is divided by the volume of air at

[单选题]Air cargo is （）A . air transportB . air freightC . air deliveryD . plane

[单选题]An air waybill is （ ）.A.flexibleB.negotiableC.non-negotiableD.transferable

[单选题]An air waybill is （ ）.A.flexibleB.negotiableC.non-negotiableD.transferable