World population before 1900 increased slowly, at 0.002 percent per year, or 20 per million inhabitants.
查看答案
According to the UN estimates, most countries in the world will experience negative population growth in 2040.
A. Y
B. N
C. NG
The developed nations will make more efforts to increase their population growth.
A. Y
B. N
C. NG
《电气装置安装工程高压电器施工及验收规范》规定,设备及器材在安装前的保管期限应为()年及以下。
A. 1
B. 2
C. 3
D. 4
听力原文:W: Didn't David tell you that he wanted to get a ride with us to the national park this weekend? Will that be all right?
M: Well, it is still not clear whether we'll have the room for one more person.
Q: What does the man mean?
(14)
A. He wants to make sure the weather is clear.
B. He doesn't know if they can get a room for David.
C. He isn't sure that there'll be a seat for David.
D. He wants David to talk with him.