北回归线穿过我国的省区是（    ）

下列对网络认识正确的有（   ）
①网络是一把双刃剑，它有利也有弊                                ②网络交往是现实交往的延伸
③网络交往的对象具有虚拟性，直接性，开放性            ④我们要善于利用网络技术，做对他人和社会有用的事情

根据短文理解, 从A、B、C、D四个选项中选择最佳答案填空。

    Lucy and Lily 1 twins. They are twelve. They 2 a big and nice bedroom. There 3 two beds and two desks in the room. Lucy and Lily like milk and bread, but they 4 tea or meat. You can see some bottles of milk and some bread on 5 desks. But you can't see 6 tea or meat in the room. Lucy and Lily can play 7 football and fly kites. But they can't mend a bike 8 a radio. They are good 9. They 10 very much.