同学们为了迎接国庆节,美化校园环境,在学校教学楼前摆红花90盆,摆的黄花是红花的12倍。黄花有多少盆?
90×12=1080(盆)
用正确的冠词a,an,the填空(不填则画“/”)。
1. I have _____ beautiful pen. _____ pen is blue.
2. It's_____dog. Its color is _____ black.
3. _____ moon is big and bright (明亮的).
4. This is _____ jacket. It's _____ orange jacket.
5. Look at _____ boy. He is _____ English boy.
在采用重力供液的氨制冷系统中气液分离器的液面位置()。