A． water pushes on your body when you swim underwater.
B． the earth is surrounded by a layer of air called the atmosphere.
C． the pressure of air around us has a powerful force.
D． the air pressure is not equalized around us.
89.Once a decision is made,it must be firmly __ .-|||-A.carried on B.carried out
[单选题]—______are you trying to prove to the police?—Where I was last night.A． WhatB． WhyC． HowD． When
[单选题]The gudgeon pin is carried in （） in the piston skirt.A . the bearingB . the crossheadC . bossesD . bridge
[单选题]H．e is determined to prove his innocence, __________he has to go to the highest court of the country.A． even soB． even nowC． even asD． even if
[主观题]In order to prove that you would be a valuable problem solver for the employer, you need to write on your résumé about the details on how you solved a problem and what wanted consequences your solution brought about.()
[单选题]The experiment ______ the discovery of a cure for cancer.A． happened toB． led upC． resulted inD． set up
[单选题]all inspections are carried （ ）conscientiously to the best of our knowledge and ability.A . inB . toC . outD . away
[单选题]The cooling of the piston is carried out by circulating （） across the underside of the crown and inside the ring belt or through specially shaped passages.A . sea waterB . scavenging airC . lubricating oilD . fuel oil
[单选题]The researchshould prove [invaluable] the study of linguistics.A.uselessB.p
[单选题]B．y mentioning the experiment in the second paragraph，the author implies that______.（ ）[A]our definition of what’s normal varies with gender[B]our focus of attention variesl with gender and age[C]our definition of what’s average changes over time[D]o