搜题请搜索小程序“爱下问搜题”
问题
计算题
分解因式：a
2
-2a+1-4b
2
答案
解:原式=
=
填空题
用科学记数法表示-0.0000064=______．
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填空题
选词填空。
hot, cool, warm, cold, humid
1. It's
in summer in Australia.
2. It often rains these days so it's very
.
3. I like autumn(秋天) because it's
.
4. It is very
in winter in Harbin.
5. The weather is very
in spring in China.
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