The surface of some areas consists______(large)of high mountains and deep valley.

[单选题]In the spoken English of some areas in the US, the "r" sounds at the end of thewords______.A． are droppedB． dropC． are being droppedD． have dropped

[单选题]In the tropical areas,______.A．)mechanization is not yet used in agricultureB．)agriculture is accepted fastestC．) a lot of farm work is still done in the old wayD．) mechanization is avoided to save primitive forest

[单选题]Thesetwoareasaresimilar_________theybothhaveahighrainfallduringthisseason.A．)tothatB)besidesthatC)inthatD)exceptthat

[名词解释] occlusal surface

[多选题]The areas of logistical work include（ ）.A.order processingB.inventoryC.tran

[多选题]The areas of logistical work include（ ）.A.order processingB.inventoryC.tran

[单选题]A． ______ consists of the symbols, characters, and usage rules that permit people to communicate with computer.A．programming languageB．networkC．keyboardD．DisplayA．B．C．D．

[单选题]The major technical areas of computer security are usually represented by the initials CIA(71)，integrity，and authentication or availability．A．confidentialityB．confidentC．secretD．safety

[单选题]To calculate the free surface correction，it is necessary to divide the free-surface moments by the（）.A . total weight of liquid loadsB . total displacementC . lightweightD . deadweight

[名词解释] 路基顶面 subgrade surface