题目: 水准仪的使用步骤?粗平、精平如何操作?水准尺如何读数? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0126/75ec67a62f44bc8308ed2fed35df0bf4.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:完形填空 完形填空. Yesterday, our teacher asked us when people could be considered old. David said thatwhen people got wrinkles (皱纹). However, Mary didn't__1__. She thought people might gain wrinkles at an earlier age because of their__2__work. Then Lily said that those__3__their 60s or more could be called old people. This time, Emily expressed her doubt. She said that some old people might__4__be full of energy and working on their dreams, which made them appear__5__ .The class was over and the teacher asked me to continue to__6__it after class. The question__7__me of a saying of J.Barrymore: a man isn't old__8__ he is pursuing (追求 ) something. My grandma is such a woman who__9__her dream even when she's 70 now. She has kept her dream of being a painter since she was a little child__10__, because her family waspoor, she had to__11__ her dream. She had to work to raise money so as to__12__ her family. Although she had never forgotten her dream, she could hardly find any__13__to makeit come true because of the tough work. Fortunately, a(n)__14__ came when she retired fromher work. She__15__taking painting lessons even though she was already old. At first, I was__16__ her idea of attending school at such an old age, but after seeing her paint happily andenjoyably, I began feeling it a good__17__.She looks fine and seems__18__. So if we have our dreams and try to__19__ them, we aren't old. If we don't know what we want and let regrets be the__20__point of our lives, then we can be considered old.( )1.A.answer( )2.A.exciting( )3.A.reaching( )4.A.sometimes( )5.A.attractive( )6.A.think about( )7.A.prevented( )8.A.even if( )9.A.remembers( )10.A.However( )11.A.give up( )12.A.combine( )13.A.way( )14.A.success( )15.A.stopped( )16.A.on( )17.A.choice( )18.A.gentle( )19.A.satisfy( )20.A.tipB.agree B.common B.avoidingB.almost B.young B.look for B.spotted B .as ifB.followsB.Also B.search forB.protect B.person B.chance B.considered B.for B.dream B.energetic B.express B.bottom C.move C.hard C.repeating C.hardly C.smart Crefer to C.reminded C.so that C.knows C.FortunatelyC.put aside C.leave C.place C.excuse C.liked C.against C.tas k C.wealthy C.change C.center D.understand D.oldD.confirming D.stillD.interesting D.turn toD.puzzledD.as long as D.findsD.ApproximatelyD.return toD.supportD.serviceD.helper D.beganD.with D.purposeD.pennilessD.realizeD.side 查看答案
题型:选择题 用轻弹簧竖直悬挂质量为的物体,静止时弹簧伸长量为L .现用该弹簧沿斜面方向拉住质量为2的物体,系统静止时弹簧伸长量也为L . 斜面倾角为30°,如图所示.则物体所受摩擦力( )A.等干零B.大小为,方向沿斜面向下C.大小为,方向沿斜面向上D.大小为,方向沿斜面向上 查看答案
题型:选择题 有三个力,F1="2" N,F2="5" N,F3="8" N,则( )A.F1可能是F2和F3的合力B.F2可能是F1和F3的合力C.F3可能是F1和F2的合力D.上述说法都不对 查看答案