A:shouldn’t eat
B:mustn’t have eate
C:shouldn’t have eate
D:mustn’t eat
甲、乙两同学站在滑板上相对而立,如图所示.当甲用60N的力推乙,甲静止不动,乙向后退,以下分析正确的是( )
I want to ____ (帮助) people.
①NO ②N2O4 ③HNO3 ④NH3
扩句
①玻璃问世了。 ②噪音像 “隐身人”。
Tomorrow we will go to Hainan. It's warm there. We will have a special Chinese New Year's Day. Now let's get ready! We need three tickets from Shijiazhuang to Hainan. We don't need winter clothes. I want a beautiful dress. My parents take some T-shirts and shorts. We need to take milk, cakes and fruit. We need three hats. The sun is very hot there. We don't want to turn black. That's all done.
① ② ③ ④
⑤ ⑥ ⑦ ⑧
⑨ ⑩ ⑪ ⑫
____