生命活动的调节通常是一种反馈调节机制,比如在大脑皮层的影响下,下丘脑可以通过垂体

题型:读图填空题

问题:

生命活动的调节通常是一种反馈调节机制,比如在大脑皮层的影响下,下丘脑可以通过垂体,调节和控制某些内分泌腺中激素的合成和分泌,而激素进入血液后,又可以反过来调节下丘脑和垂体中有关激素的合成和分泌。下图表示下丘脑神经分泌细胞、垂体细胞、甲状腺细胞及它们分泌的激素之间的关系,据图回答有关问题。

(1)激素B是________。

(2)人情绪激动时,血液中的激素C的含量将会_______________,这种生理过程的调节方式属于________调节。

(3)如果激素B合成量增多,激素A合成量变化趋势是______________,激素C合成量变化趋势是__________。

考点:神经调节与体液调节的关系动物的激素调节
题型:读图填空题

防滑器工作原理是什么?

题型:读图填空题

读我国沿海某半岛土地类型示意图,回答问题。(17分)

(1)该城市若计划布局以下农业区:粮食产区、蔬菜园艺区、乳肉家禽畜牧业区、果树林区

从下列选项中,请你选择认为正确布局的农业生产类型:

①乳畜业 ②小麦种植 ③橡胶种植④苹果种植 ⑤柑橘种植 ⑥水稻种植 ⑦大牧场放牧业

A为________,B为蔬菜种植,C为________,D为________。(填序号)(3分)

(2)随着“菜蓝子放心工程”和“绿色食品工程”的实施,B地区蔬菜基地面积迅速减小,并发生向城市西北方向转移的趋向,主要原因是____________________________________________________。(2分)

(3)此地的丘陵如果植被遭到破坏,将导致    ,冬季该地区容易受    灾害影响。(4分)

(4)总体评价该地发展农业生产的优势区位条件。(4分)

______________________________________________________________________________

(5)为进一步推进该地乳畜业发展,请你谈谈如何借鉴西欧的经验。(4分)

______________________________________________________________________________

题型:读图填空题

重载的运算符保持其原有的 、优先级和结合性不变。

题型:读图填空题

热敏型C、TP版材的最大特点就是()

A、二值成像原理

B、热交联

C、预热处理方法

D、热升华技术

题型:读图填空题

阅读理解。

     Monday: Here I am, in the middle of nowhere. This camping trip idea is not getting off to a very good

start. It's raining and the tent leaks. The hiking seemed to take forever, and I still can't understand how it

could all have been up hill! How did I ever let my brother talk me into this? When we get home-if we ever

get home-he's going to have to do something great to get back on my good side. Maybe he should sponsor

a shopping spree (狂购) at the mall!

     Tuesday: Things are looking up. The sun came out today, so we were able to leave the tents and dry

out. We're camped at the edge of a small lake that I couldn't see before because of the rain and fog. The

mountains are all around us, and the forest is absolutely beautiful. We spent most of the day dragging out

everything out of our backpacks or tents and putting it where the sun could dry it out. Later in the afternoon

we tried to catch the fish for dinner, but the fish were smarter than we were. At night we built a fire and

sang songs happily.

     Wednesday: We hiked to the far side of the lake and climbed to the top of a small peak. From there we

could see how high the other mountains were and how far the forest spread around us. On the way up we

passed through a snowfield!

     Thursday: I caught my first fish! We followed the stream that fed the lake. After about two miles, we

came to a section that Carol said looked "fishy". She had a pack rod (竿), which can be carried in a backpack.

I asked to cast it, and I caught a fish on my first try. Carol caught a few more. But they were just too pretty

to eat for lunch, so we put them back in the stream.

     Friday: I can't believe we are going home already. It will be nice to get a hot shower, sleep in a real bed,

and eat junk food, but the trip has been wonderful. We're already talking about another camping adventure

next year where we canoe down a river. It's hard to believe, but I think this city girl has a little country

blood in her veins.

1. The writer went on this camping trip because _____.

A. she enjoyed camping

B. she wanted to go fishing

C. she was influenced by her brother

D. she was tired of staying home

2. The whole morning of Tuesday, the writer _____.

A. hiked along the lake

B. dried out her belongings

C. climbed the mountain

D. caught the fish for dinner

3. It can be inferred that Carol had a pack rod with her because _____.

A. she could not afford to buy a regular fishing pole

B. she needed it to get their main source of food

C. she thought the writer of the journal might need it

D. she expected to go fishing while they were hiking

4. It is likely that the writer will _____.

A. go on another camping trip

B. invite Carol to go fishing together

C. make her brother buy her something

D. convince her brother to go camping

更多题库