题目内容
（请给出正确答案）
Why is acid rain little understood？______
A．Because it is a new phenomenon
B．Because it is not frequent enough
C．Because its formation is complex
D．Because it is difficult to study it
安装简答题APP，拍照搜题省时又省心！
更多“Why is acid rain little unders…”相关的问题
According to the passage, why is acid rain called royal water？
A．Because it can dissolve gold which is the symbol of royalty.
B．Because it seldom happens and is regarded as precious.
C．Because "royal" indicates the level of difficulty in acid rain prevention.
D．Because this problem has aroused the attention of royalty.
Why do lakes in the United States and Canada become dead lakes？
A．Fish in the lakes die because acid rain deprives them of oxygen.
B．Fish in the lakes die from taking in poisonous substances released from the acids.
C．Fish in the lakes die from direct contact with accumulated acid in the water.
D．Air pollutants are dissolved in the water and thus kill the fish.
The acid rain problem has improved a lot.
A．Y
B．N
C．NG
The second paragraph is mainly about______
A．the origin of acid rain
B．the cause of acid rain
C．the formation.of acid rain
D．the widespread damage of acid rain
A．prevalent
B．productive
C．popular
D．possible
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
