角膜本身无血管，其营养主要来源于（）、（）。

发布时间：2021-04-01 04:28 │ 来源：www.tikuol.com

题型：填空题

问题：

考点：广东住院医师眼科学眼的临床解剖、胚胎与生理眼的临床解剖、胚胎与生理题库

题型：填空题

     Miyazaki Umi lives in Odawara, Japan. The 15-year-old girl has learned a lot about China from her father
and her school. She likes Chinese culture very much. She has a dream. She hopes one day she can work in
China.
     Different to Umi, Miyata Natsuiyuki's knowledge of China all comes from a book, Romance of the Three
Kingdoms. The novel is well known in Japan. In this 15-year-old boy's mind, Chinese people are like the
heroes in the book - they work hard for their dreams.
     Last week, the two finally got a chance to see China. 2008 is the China-Japan Friendly Exchange Year.
Invited by the Suzhou People's Association for Friendship, organized by Japan's Children and Life Culture
Association, Umi and Natsuiyuki, together with another 63 Japanese people, made a trip to China.
     They first went to Shanghai. Then, in Suzhou, they saw Kunqu Opera at the Suzhou Art School.
     Umi and Natsuiyuki said they have found out something new about the country.
     In Shanghai, the high buildings amazed Umi. "It seems as if all the tall buildings in Japan are here in
Shanghai," she said.
     Natsuiyuki saw bicycles everywhere in Chinese cities."You don't see that in Japan. I think it's good for
the environment to ride bikes."
     Both the boy and the girl think that people in China are very kind and warm-hearted.
     "Though we only speak broken Chinese and English, they always answered my questions patiently," said
Umi.
     "If you have any difficulties, they come and help you at once," said Natsuiyuki." Even though you cannot
speak the language, you forget you are in a foreign country."

Miyazaki Umi	Miyata Natsuiyuki
The girl has learned about China from her father and her school.	His knowledge of China all comes from a book, 1______.
It seems 2______ all the tall buildings in Japan are here in Shanghai.	He saw bicycles everywhere in Chinese cities. He thinks 3______ to ride bikes.
Chinese people always answered her questions patiently	If you have any difficulties, they come and help you at once

They think that Chinese people are 4______.

查看答案

题型：填空题

下列离子方程式书写正确的是（　　）

A．饱和石灰水跟稀硝酸反应Ca（OH）₂+2H⁺=Ca²⁺+2H₂O

B．稀硫酸与锌反应：H₂SO₄+Zn=Zn²⁺+SO₄^2-+H₂↑

C．碳酸钙与盐酸反应：CO₃^2-+2H⁺=CO₂↑+H₂O

D．碳酸氢钠溶于醋酸溶液：HCO₃^-+CH₃COOH=CH₃COO^-+H₂O+CO₂↑

查看答案

题型：填空题

中枢免疫器官主要包括（）。

A.胸腺和骨髓

B.骨髓和淋巴结

C.淋巴结和脾脏

D.胸腺和淋巴结

E.脾脏和肝脏

查看答案

题型：填空题

（18分）有A、B、C、D、E、F六种短周期元素，原子序数依次增大，B、C、D的阳离子、A的阴离子均具有与氖原子相同的电子层结构；A、B可形成离子化合物B₂A；D的最高价氧化物既能与强酸反应，又能与强碱反应；E的原子结构示意图为：；F的最外层电子数是电子层数的2倍。

试回答下列各问题：

（1）B元素为（填元素符号）

（2）F元素位于元素周期表中第周期第族

（3）化合物B₂A的电子式____________________

（4）D的最高价氧化物与B的最高价氧化物对应的水化物溶液反应的离子方程式：

（5）将C、D用导线相连浸入B的最高价氧化物对应的水化物的溶液中，形成原电池，正极的电极反应为

查看答案

题型：填空题

已知各工作之间的逻辑关系如下所示，绘出的双代号网络图如下，图中的错误有( )。

A．工作

B．A

C．B

D．C

E．D

F．E

G．紧前工作

H．—

I．—

J．A

K．AB

L．CD

查看答案

更多题库