在烃类热裂解过程中,同碳原子数的烷烃,其断链反应没有脱氢反应容易。
参考答案:错
阅读短文,作判断,用“T”或“F”表示:
It is Saturday today. Tom has no lesson. Tom and his father are on a bus now. They are going
to the supermarket. On the bus, Tom meets his uncle Henry, his aunt Ann and their son Tony. Tom
says hello to them. They are going to the zoo. Tony wants to see the animals in the zoo. He likes
animals. He says he can see many animals there. At the bus stop they say goodbye.
( )1. It is Saturday tomorrow.
( )2. Tony is Tom’s brother.
( )3. Tom’s uncle is going to the supermarket.
( )4. Ann is Tony’s mother.
( )5. Henry is on the bus, too.
( )6. There are no animals in the zoo today.
下图是蝗虫的发育过程示意图,请据图回答下列问题:
(1)利用图中的名称,按顺序写出蝗虫发育的三个阶段: → → 。
(2)蝗虫与家蚕的发育不同的是不经过 这个
阶段;所以蝗虫的发育类型属于 。