问题
多选题
下列实验操作中，正确的是（ ）
A．过滤操作中，为了加快过滤速度可用玻璃棒在漏斗中轻轻搅拌
B．可以选用酒精作为萃取剂从碘水中萃取碘
C．蒸馏操作时，应使温度计水银球靠近蒸馏烧瓶的支管口处
D．分液操作时，分液漏斗中下层液体从下口放出，上层液体从上口倒出
答案
CD
搜题请搜索小程序“爱下问搜题”
下列实验操作中，正确的是（ ）
A．过滤操作中，为了加快过滤速度可用玻璃棒在漏斗中轻轻搅拌
B．可以选用酒精作为萃取剂从碘水中萃取碘
C．蒸馏操作时，应使温度计水银球靠近蒸馏烧瓶的支管口处
D．分液操作时，分液漏斗中下层液体从下口放出，上层液体从上口倒出
CD
| 阅读理解。 | ||
| Come and see all the interesting animals here. The new tigers from America are dancing . The penguins are playing volleyball. The monkeys are playing the guitar. The dogs are doing math. The dolphins are playing with balls. The birds from New Zealand are waiting to meet you. You can see everything you want here! Keep the zoo clean! Don't give food to the animals or go near them.
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| 1. How many kinds of animals does this passage mention? A. Six B. Seven C. Eight D. Five 2. The zoo is open at _____. A. 9:00a.m. on Monday B. 23:00p.m. on Sunday C. 9:30a.m. on Friday D. 8:00a.m. on Wednesday 3. The zoo opens _____ days in a week. A. three B. seven C. two D. six |