题型：判断题 某固态非金属单质A和氧气发生化合反应生成B（B为气体），在同温同压的条件下，气体B的体积是反应掉氧气体积的两倍．以下对B的分子组成的推测一定正确的是（ ）A．有1个氧原子B．有2个氧原子C．有1个A原子D．有2个A原子 查看答案
题型：判断题 用方框内所给单词的适当形式填空,每个单词限用一次。interest big real friend play terrify watch be quick paint 1. I am _______ of the strange thing.2. They are very _______ to us students.3. Her _______ problem is that she can't sleep well at night. 4. He is _______ in my story book.5. My father always spends too much time _______ TV. 6. I _______ don't know anything about him. 7. Do you like _______ pictures.8. He spends a lot of time _______ games every day. 9. E-mail English is great for writing _______. 10. My partner used to be afraid of _______ alone. 查看答案