When liquid reaches the compressor of a refrigeration system through the suction line, the
A.flooding back
B.superheating
C.overflowing
D.recycling
A.flooding back
B.superheating
C.overflowing
D.recycling
When El Nino reaches a place, the temperature there would change a great deal.
A.Y
B.N
C.NG
When the dog reaches home, he ______ but it proves in vain (徒劳).
Two triangular objects start from at rest, as shown in Figure. Consider no friction. When m=2kg reaches the ground, the distance traveled by M is _________________cm.
Aeroplanes can climb quickly ______
A.in warm air
B.in cold air
C.when it reaches the polar region
D.only when the clouds are down low ______
A、when it is dispatched
B、when it reaches the offeree
C、when it is withdrawn
D、when it is revoked
A.in warm air
B.in cold air
C.when it reaches the polar region
D.only when the clouds are down low
A、disappear
B、transfer to the reactants
C、be unchanged
D、involve in the reaction
A.independent from
B.independent of
C.independent to
D.independent on
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