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问题 多项选择题

贵州是中国下列矿产（）的三大产区之一。

A、重晶石

B、铝土矿

C、磷矿

D、黄金

答案

参考答案：B, C

填空题

为了考察一个养鸡场里鸡的生长情况，从中抽取了5只，称得它们的重量如下（单位：kg）：3.0，3.4，3.1，3.3，3.2，那么样本的极差是______，方差是______．
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填空题
词形变换：选择方框里的词，并用其适当形式填空，每词只用一次。
begin   have   do   England   they   we   play   this   teach   thank
1. It is eight. Let's ______ our class!
2. He ______ a round face with a big nose.
3. Jane comes from England. She is ______.
4. Jim often ______ his homework after school.
5. Would you like something to drink? No, ______.
6. Look! Han Meimei is ______ guitar over there.
7. I teach Amy to learn Chinese and she ______ me to learn English.
8. This is their classroom. It is ______.
9. Please help ______ carry the big box.
10. What are ______ in English? They are apples.
Ⅰ
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