读下图回答并完成下列要求:
(1)图内四个省中临海的有 ,临 海;纬度最高的是 。
(2)四个省中,有热带分布的是: 、 。(写省名)
(1)②;南海;④
(2)云南;广东
What does unwanted e-mail messages do to the providers of the Internet services
A.Raising their cost.
B.Raising the Internet speed.
C.Improving their business.
D.Attracting investment.
将铁屑溶于过量盐酸后,再加入下列物质,不会有三价铁生成的是 ( )
A.漂白粉;
B.过氧化钠;
C.硝酸锌;
D.氧化铜