题目

为探究液体内部压强的特点，用隔板将一容器分成左右两部分，隔板下部有一圆孔用橡皮膜封闭（如图所示），当左右两侧各注入适量的液体后，图中符合实际情况的是（ ）?A.?B.?C.?D.? 答案：【答案】B【解析】解：A、两边装的都是水，右侧的水到达橡皮膜的深度大一些，所以右侧的压强大些，故橡皮膜应该左凸，故A错误；B、两侧都是水，且深度相同，所以橡皮膜不形变，故B正确；CD、由于盐水的密度大，所以在深度相同的情况下，盐水的压强比水的压强大，故橡皮膜应该左凸，故CD错误动词填空,用括号内所给动词的适当形式填空，并将答案写在横线上。1.We must do everything we can ______________(learn) all the subjects well.2.Nobody knows what ______________(happen) to him in a few years.3.All work and no play ______________ (make) Jack a dull boy.4.— Cathy, could you please turn down the TV? I ______________(get) ready for the exam.— OK.5.He put on his coat and_____________(leave) the room without a word.6.You’d better ______________(not do) outdoor activities on such a hazy day.7.______________(tell) your problems to your friends will help you feel better.8.— How’s everything going in the USA, my dear?— The school life abroad I am looking forward to ______________ (not seem) so wonderful, Mum.