问题
选择题
观察现象是化学实验的重要环节，物质在氧气中燃烧的现象是 [ ]
A．木炭：发出红光
B．硫：发出淡蓝色火焰
C．红磷：产生白雾
D．铁：火星四射
答案
答案：D
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观察现象是化学实验的重要环节，物质在氧气中燃烧的现象是 [ ]
A．木炭：发出红光
B．硫：发出淡蓝色火焰
C．红磷：产生白雾
D．铁：火星四射
答案：D
| 阅读理解。 | |
 I was born in the computer age. 1 . They were already adults when the first personal computer came out. But with the development of technology, more jobs need skills like typing, sending e-mails, etc. When I was in middle school, they started asking me to help them do things with computers. 2 . But my dad would make me stay up to finish his work. My parents even made me talk on the phone whenever there was something wrong with our computer. After realizing my parents really need my help, I tried to be more understanding. After all, I wasn't born knowing how to use a computer. 3 ? I feel that teaching them by myself is better. We can communicate more and share understanding. I know it's usually hard for adults to learn new skills. And a patient teacher is helpful for them. 4 . Parents and teens need to help each other.
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