题目

下列实验过程与如图所示描述相符合的一组是（ ） A．①表示水的电解B．②表示在一定温度下，向饱和氢氧化钙溶液中加入氧化钙C．③表示将稀盐酸滴入氢氧化钠溶液中，在M点时，溶液中的溶质只有氯化钠D．④表示向盐酸和氯化铜的混合溶液中滴加氢氧化钠溶液 答案：D (A)There was ice on the road, and the doctor’s car hit a tree and turned over three times.To his surrise,he wasn’t hurt.He got out of the car and walked to the nearest house.he wanted to telephone the garage for help.AA woman,one of his patients,opened the door.”Oh,doctor,”she said,”I have only just telephoned you.You must have a very fast car.You hae got here very quickly,there was a very bad accident on the road outside.I saw it through the window.I’m sure the driver will need your help.” 判断正误（写T或F） (  )1.The doctor was driving t the garage before the accident. (  )2.A tree fell across te road,so the traffic accident happened. (  )3.The doctor knew one of his patients lived in the nearest house. (  )4. The patient phoned the doctor because she thought someone needed help. (  )5. The woman wanted the doctor,but was surprised that he came so quickly. (B) This is a street crossing. There are red and green lights at each corner. Drivers must watch he lights carefully.When there is a green light, the cars may go. When there is a red light, the cars must stop. Drivers must wait until the red light changes to green. Then they can go. Sometimes drivers want to make a right turn or a left turn. They can make a right turn when the light is green or red. But they must wait until the green light is shining if they want to turn left.Some people are colour-blind. They can’t see the difference between red and green. These people must not drive, or else there will be accidents. We must keep our streets safe. (  )6.Drivers must watch __carefully at each corner. A.           Green lights     B. red lights    C. the policeman     D. both A and B (   )7.When there is a red light, ___________. A.           the cars must stop                   B. the cars may go C. the cars may make a left turn           D. the cars can’t stop (  )8. The cars can make a left turn when _______________. A.           There is a red light           B. There is a green light C. There is a red or green light         D. There is a yellow light (  )9.The colour-blind people must not drive because____________. they are blind    B. they can’t tell the difference between red and green. A.           C.they can’t hear anything       D. they can’t see the lights. (  )10.According to the passage, we can know ____________. A.              where there is a street crossing, there are traffic lights B. the colour-blind people caused(引起) all the traffic accidents C.if drivers always watch the traffic lights carefully, there will be fewer accidents D. people who wear glasses cannot drive cars.