This mountain range has many high（）and

1、For this reason, many US（）contain the

For this reason, many US（）contain the provision “time is of the essence” within their preamble.AcontactsBcontentsCcontendsDcontract

2、More and more high——rise buildings hav

More and more high——rise buildings have been built in big cities space.Ain search ofBin place ofCfor lack ofDfor fear of

3、High firing pressures and a low exhaus

High firing pressures and a low exhaust temperature in a diesel engine may result from （）.Adecreased piston to cylinder head clearanceBincreased exhaust system back pressureCearly fuel injection timingDlow scavenge air temperature

4、（） pistons have low inertia and high c

（） pistons have low inertia and high coefficient of thermal expansion.ACast ironBCast steelCForged steelDAluminum

5、This year's sales in many companies we

This years sales in many companies were lower than （）.Alat year'sBwhich of last year'sClast yearDin last year

6、__ unemployment and crime are high, it

__ unemployment and crime are high, it can be assumed that the latter is due to the former.A Before B Where C Unless D UntilA. Before Where C. Unless D. Until