"With the air supply on, the air pressure in an enclosed lifeboat will be .
A.varying according to the speed of craft
B.lower than outside
C.larger than outside
D.equal to outside
正确答案是C
"With the air supply on, the air pressure in an enclosed lifeboat will be .
A.varying according to the speed of craft
B.lower than outside
C.larger than outside
D.equal to outside
正确答案是C