题目列表(包括答案和解析)
| A.d极为阴极 |
| B.若利用甲池精炼铜,b极应为粗铜 |
| C.放电时铅蓄电池负极的电极反应式为: PbO2(s)+4H+(aq)+ |
| D.若四个电极材料均为石墨,当析出6.4g Cu时,两池中共产生气体3.36L(标准 |
The fossils of dinosaur(恐龙化石) were ________ by the scientists in Liaoning province.
A. found
B. invented
C. found out
D. discovered
| A.A池为电解池,B池为原电池 |
| B.d、e两极都发生氧化反应 |
| C.e极应为粗铜板材料 |
| D.B池中e极质量增加12.8g |
Where can we usually see fossils
(化石)?In museums, right? But Zhang Wei, 16, of Xibei Dianjian School, Xi'an, found one at the roadside. He saw a big bone and said it was a fossil. Nobody believed him but his teacher, Mr Zhang.
Mr Zhang gave the bone to a museum. Now, the museum says the bone is a rhinoceros
(犀牛)fossil! It's hundreds of thousands of(几十万)years old!(1) ________ found the important fossil.
[ ]
|
A .Zhang Wei |
B .Xibei |
C .Xi'an |
(2) Where did he find it?
[ ]
|
A .In a museum. |
B .At the roadside. |
C .In a school. |
(3) How old is the rhinoceros fossil?
[ ]
A
.Hundreds of years old.B
.Thousands of years old.C
.Hundreds of thousands of years old.中译英.
一位研究恐龙化石的专家
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