蔬菜按食用部位分类有()。A、叶菜类 B、食用菌 C、茄果类 D、薯芋类 发布时间:2018-10-28 02:56 │ 来源:www.tikuol.com 题型:单项选择题 问题: 蔬菜按食用部位分类有()。A、叶菜类B、食用菌C、茄果类D、薯芋类
题型:单项选择题 One day a pig went to the stable(马棚)to __1__ a good friend, an old horse, and was going to ___2__ there for the night . Night came and it was time___3___ sleep. The pig went into the straw heap(稻草堆) and lay comfortably(舒服地). A long time __4__, but the horse was still___5___ there and did not move. So the pig asked the horse ___6____ he did not go to sleep. “Standing like this is the beginning of sleeping.” answered the ____7____.The pig found it __8___ to believe(相信) and said, “How can you stand there sleeping? It is not comfortable at all.” The horse answered, “Comfort is your habit(习性).___9____ horses, we have the habit of running quickly. So we are always ready to run quickly even if(即使) we are __10___.小题1:A.lookB.seeC.watchD.look at小题2:A.leftB.sitC.layD.stay小题3:A.byB.onC.toD.with小题4:A.passedB.passC.pastD.was passed小题5:A.standingB.standsC.sittingD.lying小题6:A.whatB.whyC.whenD.which小题7:A.animalsB.pigC.horseD.heap小题8:A.hardlyB.easilyC.difficultD.easy小题9:A.WhileB.ForC.AsD.Like小题10:A.sleepB.asleepC.sleptD.to sleep 查看答案
题型:单项选择题 在实验中,小车在运动中会受到阻力作用,在小车沿木板滑行的过程中,除橡皮筋对其做功外,还有阻力对其做功,这样便会给实验带来误差,我们在实验中想到的办法是使木板略为倾斜,对于木板的倾斜程度,下面说法中正确的是( )①木板只要稍微倾斜一下即可,没有什么严格要求 ②木板的倾斜角度在理论上应满足下面条件:即重力使物体沿斜面下滑的分力应等于小车受到的阻力 ③如果小车在倾斜的木板上能做匀速运动,则木板的倾斜程度是符合要求的 ④其实木板不倾斜,问题也不大,因为实验总是会存在误差的A.①②B.②③ C.③④ D.①④ 查看答案