问题 填空题

声源振动的______决定了它发出声音的音调.声源振动的越快,发出声音的音调______,声源振动的越慢,发出声音的音调______(填“越高”“越低”或“不变”)

答案

声源振动时发出声音的音调跟物体的振动快慢有关,声源振动越快,发出声音的音调越高,振动越慢,发出声音的音调越低.

故答案为:快慢;越高;越低.

阅读理解

阅读短文,选择正确答案

Many people love going on a trip by plane,but an airport is usually far from the city.You have to arrive there and wait for hours for the plane to take off and it is often late.You can’t open the window,you can’t choose the food.Planes are fast,but it takes hours to get out of the airport and into the city.

I like travelling by train.I think trains are safe.Train stations are usually in cities.When you are late for a train,you can catch another one.You can walk around in the train and open the windows.You can see many interesting things on your way.I know it takes a little sore time.

I also like cars.You can start your trip when you want to,and you don’t need to get to a station bus stop.You can carry many things with you,too,but sometimes there are many cars on the road.

小题1:Many people like travelling by plane because ________.

A.it is safe                                                B.you can open the window

C.it is fast

小题2:What does “take off’’ mean?

A.达到                  B.起飞                  C.降落

小题3:If you want to take many firings with you,you would like to take ________.

A.a bus                  B.a train                C.a car

小题4:What is not good about the car?

A.You needn’t go to the station.

B.You can start your trip when you want to.

C.There are too many cars on the road.

小题5:Which sentence about the writer is TRUE?

A.He likes taking a plane because it takes a lot of time to go to the city.

B.He likes taking a train because it is safe and convenient.

C.He likes taking a bus because he can drive it.

单项选择题