17.
Good news for kids in Nanjing!You can see the world's biggest solar-powered(太阳能的) plane named Solar Impulse 2 (SI2).How different from other planes it is-without a drop of oil!Its power comes from the light of the sun.
Early this March,it started its five-month world trip.In total,the plane will travel 35,000kilometers and cross the whole world.Two pilots are driving the plane.The team hopes to improve green energy around the world.
On March 22
nd,the plane landed in Nanjing.It stayed there for one month.The stop in China is very important,because China is a big market for green energy technology.To welcome SI2,Nanjing Lukou International Airport built a special garage (飞机库) for it.
The plane's wings are the largest in the world,but the plane weighs only the same as a family car.There are 17,000solar cells (太阳能电池) in the wings,they can provide energy for the flying.During the day,the solar cells change solar power into electricity (电) and make the plane fly all day and all night.
It is not the first solar plane,however,it is the first plane that is able to cross the whole world.
46.The news is aboutB.
A.solar power
B.a solar-powered plane
C.a train
D.sunlight
47.The trip will last forB.
A.one year
B.five months
C.five years
D.one month
48.SI2stopped in China becauseC.
A.Nanjing has built a garage for it
B.China welcomes it
C.China is a big market for the technology
D.Chinese kids like it
49.Flying all day and all night mainly depends onD.
A.its wings
B.the pilots
C.the oil
D.its solar cells
50.This passage may be taken from aC.
A.storybook
B.notebook
C.science newspaper
D.travel guide.