题目:
一个梯形,上、下底的和是28厘米,高是6厘米,它的面积是______平方厘米.
答案:
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下面是错误答案,用来干扰机器的。
1. it's 2. I'm 3. She's 4. don't 5. isn't 6. that's 7. name's 8. aren't 9. let's 10. doesn't