下列关于材料,能源及信息的说法中正确的是( )
A:超导材料主要用于制作电饭锅等电热器
B:自然界中的风能属于一次能源
C:手机利用声波来传递信息
D:至少需要8颗地球同步卫星才能实现全球通信
“朝为田舍郎,暮登天子堂”的极大诱惑,吸引了无数莘莘学子,使他们“老死于文场而无所恨”。科举制的实行( )①扩大了官吏人才来源 ②有利于提高官员文化素质
③加强了中央集权,扩大了封建统治的社会基础 ④为历朝沿用,严重阻碍了中国的社会进步
从方框内选择适当的句子补全对话,有两项多余。
A.What do you want to drink?
B.The drinks there are good, aren't they?
C.That's a good place to relax.
D.Why don't we get something to drink.?
E.It is always so crowded there.
F.I like the loud music there.
G.So where would you like to go. Amy?
A: I'm thirsty, Amy.
B: Me too.____
A: Yeah. Let's go to Kangle. I love the soft drinks there.
B: Oh, Sam... I don't like Kangle.
A: Why? ____
B: The drinks are nice. I just don't like its environment. ____ And the loud music makes me feel uncomfortable.
A: OK. ____
B: Let's go to Semi-island. The soft music there makes me feel relaxed.
A: Good idea! ____