The nervous system may be divided two parts

The load between two steam－driven alternators operating in parallel may be adjusted by varying .

In a diesel engine lube oil system, which of the following parts should be lubricated firs

_____, i.ea steam cooler, may be filled in the boiler system to control the superheated st

Optimism and pessimism may be well understood by the case as follows; two persons thirsty

The American literature in modern period is divided into two parts by the event ofA．the ex

In first two paragraphs, the author implies thatA．a scientist may be confused what science