题目

信息匹配，选出与问题对应的解决方案。【1】Tomorrow I will have an English test. I didn’t find the answers to a lot of questions.【2】Mr. Smith’s son hurt his legs when he played in the garden.【3】Maria wants to spend her weekend in the countryside. It’s not far from her home. She wants to have a green travel.【4】Jack is shy. He often worries about it. He wants to make friends with others.【5】Jeff wants to take part in the football match next month. But he doesn’t well in it. A. Friendship ClubB. Bicycle for RentC. English CornerD. Hospital for ChildrenE. F如图所示，用滑轮组拉着一个木块P沿水平面以0.5m/s的速度匀速向右运动，此时弹簧测力计的读数为4N，若每只滑轮重1N，绳与滑轮间摩擦不计，则该滑轮组的机械效率为____，在2s内拉力F做的功为____J．