题目内容：
The survival of the civilization as we know is_________ threat.
A． within
B． under
C． toward
D． upon
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：The survival of the civilization as we know is_________threat.
- 题目分类：习题答案
- 题目类型：选择题
- 号外号外：注册会员即送体验阅读点！
In 1847 most countries of the world were ______.
In 1847 most countries of the world were ______.A. not yet using postage stampsB. collecting valuable
下列不属于胃肠激素的激素是 ( )
下列不属于胃肠激素的激素是 （ ）A．肾上腺素B．胃泌素C．促胰液素D．抑胃肽E．胆囊收缩素
Passage Two How can a single postage stamp be worth $ 16,800? Any mistake made i
Passage TwoHow can a single postage stamp be worth $ 16,800?Any mistake made in the printing of a sta
Why does it take long for people to change their food?
Why does it take long for people to change their food?A． Because labs are not easily accessible to re
傅雷是我国现当代著名的___________家。
傅雷是我国现当代著名的___________家。