A:need
B:must
C:would
D:might
⑴Your school is great. ____ A. See you later.
⑵How are you?____ B. It's a new school.
⑶Goodbye!____ C. I can show you.
⑷Excuse me, where is the shop?____ D. Thanks.
⑸What is it?____ E. I'm fine. Thank you.
为解决漫画《谣言》中的问题,我们公民应( )
如图所示,一个不漏气的薄塑料袋平放在桌面上,一根饮料吸管插在袋口边缘,把袋口折几折后用胶带封住,使塑料袋口不漏气,把两块材质、厚度相同的正方形硬纸板相隔一定距离平放在塑料袋上,大纸板的边长是小纸板的两倍.在大纸板上放四个一元硬币,在小纸板上放一个一元硬币,然后用嘴慢慢向里吹气.则塑料袋抬起纸板的顺序是( )
已知集合A={x|3≤x<7},B={x|x2﹣12x+20<0},C={x|x<a}.
(1)求A∪B;(∁RA)∩B;
(2)若A∩C≠∅,求a的取值范围.