问题
填空题
用括号内所给词的适当形式填空。
1. My brother _____ (have)a baseball.
2. _____ he _____ (play) sports every day?
3. She ______ ( not watch) TV in the evening.
4. Let's ______ (take) these books to the classroom.
5. Can you ______ ( bring) the pen to me?
6. We have many ______ ( sport) clubs.
7. He only watches ______ ( they) on TV.
8. I have only one ______ ( watch).
9. Let ______ ( I ) have a look.
10. Tom ______ ( not do) sports in the morning.
答案
1. has 2. Does; play 3. doesn't watch 4. take 5.bring
6. sports 7. them 8. watch 9. me 10. doesn't do
。某学习小组利用此原理设
计如图所示装置制取氯气并探究其性质。
②乙装置中FeCl2溶液Cl2反应的离子方程式是 。证明FeCl2与Cl2发生了氧化还原反应的实验方法是（填
加试剂的名称、至少填二种）方法 、
溶液：
，共消耗20mLNa2S2O3溶液，则漂白粉中Ca(ClO)2的质量分数为 。