皮皮学，免费搜题
登录
搜题
【单选题】
What is the purpose of the speaker?A.
To warn us of the danger of smoking before children.
B.
To warn people with breathing problems not to smoke.
C.
To warn that mothers who smoke may affect their children.
D.
To warn that fathers who smoke may affect their children as mothers.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】The south of the country grows richer, ______ the north grows poorer.
A.
until
B.
while
C.
unless
D.
as
【简答题】cell1是cell2的同频邻区，cell3也是cell2的同频邻区，但cell1和cell3不相邻。如果cell1和cell3的PCI相同，则认为cell1和cell3__。
【判断题】Interphase is the initial stage of the cell cycle, is a time when the cell grows continuously.
A.
正确
B.
错误
【简答题】下列四种羰基化合物中，哪种化合物C==O伸缩振动频率最高?为什么?
相关题目：
参考解析：
知识点：
题目纠错 0
发布
