The shuttle exploded in the air suddenly and broke into ______ at once.A．diversityB．fragme

When the order _____ is received from the bridge, the main air stop valve in the starting air line should be shut.

Excessively low air pressure occurring in the intercooler of a reciprocating air compresso

In what condition does a typhoon begin？A．When the warmer air meets with the cooler air.B．W

Where did the second bomb explode？A．In the temple.B．In the city centre.C．In the bus.D．Outs

In May 1989, space shuttle "Atlantis" released in outer space the space probe "Megal－lan",

Everyone aboard the plane 【perished 】in the air c