问题
选择题
如果养鱼缸长时间不换水，缸的内壁上就会长出绿膜，水会变成绿色。这是因为下列哪类植物大量繁殖的结果 [ ]
A．藻类植物
B．苔藓植物
C．蕨类植物
D．种子植物
答案
A
搜题请搜索小程序“爱下问搜题”
如果养鱼缸长时间不换水，缸的内壁上就会长出绿膜，水会变成绿色。这是因为下列哪类植物大量繁殖的结果 [ ]
A．藻类植物
B．苔藓植物
C．蕨类植物
D．种子植物
A
| 选词填空。 | |
They 3.________in Australia. Koala likes 4._________very much, They always sleep in the5.________ . They can sleep 20 hours a day. Kangaroos like 6.___________, and they can jump very 7._________ . Sometimes you can see 8._________ kangaroos stay in their mother's pouch(育儿袋) for months. I like these two kinds of animals very 9._________.Which animal do you 10.__________? |