问题
选择题
如图是一套检验气体性质的实验装置,向装置中缓缓地通入气体X,若关闭活塞S,则品红溶液无变化,而澄清石灰水变浑浊;若打开活塞S,则品红溶液褪色.据此判断气体X和洗气瓶内液体Y可能是下表中的( )
A.A B.B C.C D.D |
答案
答案:B
如图是一套检验气体性质的实验装置,向装置中缓缓地通入气体X,若关闭活塞S,则品红溶液无变化,而澄清石灰水变浑浊;若打开活塞S,则品红溶液褪色.据此判断气体X和洗气瓶内液体Y可能是下表中的( )
A.A B.B C.C D.D |
答案:B
句型转换 |
1. What animal do you like best?(改为同义句) What____your____animal? 2. Koalas sleep during the day.(用at night改为选择问句) _________Koalas sleep during the day____ at night? 3. Lions are from Africa. (改为同义句) Lions____ _______Africa. 4. Bill likes dogs because they are friendly to people.(对划线部分提问) —____ Bill like dogs? 5. The shy girl wants to see the giraffes.(对划线部分提问) _________ _________does the shy girl want to see? |