为下列反应事实建议合理的反应机理用表示电子对的转移,表示单电子的转移,并写出各步可能

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题型:问答题

问题:

为下列反应事实建议合理的反应机理用 表示电子对的转移, 表示单电子的转移,并写出各步可能的中间体。

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题型:阅读理解

阅读理解。

     Everybody has a home. People have homes.Animals have homes. People have many different

kinds of homes. Animals have different kinds of' homes, too.

     Some animals live in holes under the ground. The woodchuck ( 土拨鼠) lives under the  ground. His

home has two doors.  If any enemy comesinto one door, the woodchuck goes out through the other. Some animals live in holes in trees. Some squirrels(松鼠)build their nests(窝)high in trees. Most of the

birds live in nests. Crows(乌鸦)build their nests high in the mountains.

1. People have______.

A.different kinds of mountains

B. holes

C. different kinds of homes

D. all kinds of trees

2. The passage is about______.

A. some trees

B. the homes of some animals

C. animals' life

D. different animals

3. ______live under the ground.

A. All the animals

B. The woodchuck and the squirrel

C. Some animals

D. somebirds

4. How many doors does the woodchuck have in his house?

A. One.B. Two.

C. Three.D. No one.

5. Animals' homes are______.

A. not the sameB. in trees

C. in holesD. the same

题型:填空题

对任意的实数x>0, 总有a-2x-|lnx|≤0, 则实数a的范围为  ▲   

题型:单项选择题 A1型题

胚胎期7个月时,体内最主要的造血器官是()

A.肝脏

B.脾脏

C.胸腺

D.骨髓

E.卵黄囊

题型:单项选择题 A1型题

麻醉药品和精神药品目录由哪个或哪几个机构或部门制定、调整并公布()。

A.国务院药品监督管理部门

B.国务院药品监督管理部门会同国务院公安部门

C.国务院药品监督管理部门会同国务院卫生主管部门

D.国务院药品监督管理部门会同国务院公安部门、国务院卫生主管部门

E.国务院卫生主管部门

题型:问答题

有人认为:"没有杀人的目的,就不构成故意杀人罪。"请运用相关刑法理论和规定进行辨析。