问题
选择题
儿童脑的质量接近成人水平的年龄约是[ ]
A．五六岁
B．四岁
C．七八岁
D．十二岁左右
答案
答案：C
搜题请搜索小程序“爱下问搜题”
儿童脑的质量接近成人水平的年龄约是[ ]
A．五六岁
B．四岁
C．七八岁
D．十二岁左右
答案：C
| 完形填空。 | ||||
| There are four kinds of satellites. The first kind of satellite studies the 1 of the earth. They are used to 2 maps. They also help countries to see where they may 3 oil or gold. The second kind guides ships and planes. A ship or plane can send 4 to the satellite, and the satellite can find out where it is. The third kind studies 5 . These satellites 6 clouds and strong winds moving across the earth. They warn countries when very 7 weather is coming. They take photos of the earth from thousands of kilometers above it and 8 the photos to a weather station on the ground. The fourth kind is used for communication. Telephone calls 9 countries can be sent by these satellites. Some can carry hundreds of calls at one time. The calls are sent to the satellite,then the satellite sends them to a station in the country Which is being phoned. These satellites 10 carry television pictures. They can receive and send about eight programs at a time. How amazing! | ||||
|