问题 选择题

如图所示,底面积不同的圆柱形容器A和B分别盛有甲、乙两种液体,两液面相平,且甲的质量大于乙的质量。则此时液体对各自容器底部的压强PA、PB的压力FA、FB的关系是

A.PA<PB FA=FB

B.PA<PB FA>FB

C.PA>PB FA=FB

D.PA>PB FA>FB

答案

答案:D

因为m>m,即ρV>ρV,又因为h=h,S<S,所以V<V,所以ρ>ρ,根据液体内部压强公式p=ρgh可得,PA>PB;另外由图可知,液体对容器底部的压力等于各液体所受的重力,即FA=GA=mg,FB=GB=mg,因为m>m,所以FA>FB

完形填空

Do you want to be the most popular person in the class? You         need change your character(性格). Yes, you can be popular without changing the character. In my          , you just need to improve your personality. In fact, the most popular people are trusted (被信任) and loved because they stay normal but still have something that makes them different           the rest of us. Here are some pieces of          about becoming the most popular person in the class.

If you want others to like and respect you, you have to start by liking and       yourself. Do not change yourself             please (取悦) others.

Be helpful to everyone and do it happily.         nice to people is almost like helping them,       . Because by being nice, you make others happy.

Be active and have a positive attitude (积极的态度) towards life. Develop confidence (自信) in yourself.

Stay          and wear fresh clothes. Do not try to follow fashion to please others.

Respect cannot be gotten by big words or power. You have to get it by being honest. It also      your personal growth. You must be a person that can be trusted to get respect.

小题1:A. really     B. shouldn’t      C. don’t

小题2:A. opinion B. eye         C.head

小题3:A. to     B. from         C. as

小题4:A. advice     B. suggestion      C. idea

小题5:A. accept     B. to accept       C .accepting

小题6:A. in order to B. as soon as      C. depend on

小题7:A. Be     B. Being           C. To be

小题8:A. also       B. too         C. either

小题9:A. clean       B. dirty          C. bright

小题10:A. make       B. let         C. helps

选择题