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【单选题】
在讨论钨极氩弧焊对人体的影响时,焊工甲说在焊接时会发出有害气体,但是焊工做好防护工作,就可以大大减小有害气体对身体的侵害;焊工乙说高频电磁辐射的作用时间很短,对人体的影响不大。你认为( )的说法正确
A.
焊工甲
B.
焊工乙
C.
两者都对
D.
两者都错
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皮皮学刷刷变学霸
举一反三
【单选题】下列生理活动中，主要通过神经反射而完成的调节是？
A.
育龄期女性月经周期的正常进行
B.
肢体在受伤害性刺激时的回撤动作
C.
餐后血糖很快恢复正常水平
D.
正常人体的生长与发育过程
E.
大量出汗时引起尿量减少
查看完整题目与答案
【简答题】The Drink Your Body Needs Most 1 Our bodies are estimated to be about 60 to 70% water. Blood is mostly water, and our muscles, lungs, and brain all contain a lot of water. Water is needed to regulate ...
查看完整题目与答案
【多选题】威灵仙的原植物是
A.
威灵仙
B.
东北铁线莲
C.
棉团铁线莲
D.
铁皮威灵仙
E.
草本威灵仙
查看完整题目与答案
【单选题】Which mode account for most delivery in international trade? ( )
A.
By railway.
B.
By water.
C.
By air.
D.
By trucks.
查看完整题目与答案
【单选题】—Could you tell me ? —Certainly. [     ]
A.
what was the matter with my watch
B.
what the matter with my watch was
C.
what's the matter with my watch
D.
what the matter with my watch is
查看完整题目与答案
【单选题】下列生理活动中,主要通过神经反射而完成的调节是
A.
正常人体的生长和发育过程
B.
育龄期女性月经周期的正常运行
C.
肢体在受到伤害性刺激时的回撤动作
D.
餐后血糖很快恢复正常水平的过程
查看完整题目与答案
【简答题】-What makes her so frightened? -Oh, it is the mouse that she ___ on her bad while looking for her watch． [     ] A. came about B．came across C．came through D．came up
查看完整题目与答案
【判断题】后边工序在产品多加工的程度可以弥补前边工序少加工的程度,所以全部在产品的完工程序可以按50%平均计算。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which product has been the most successful in 2002?
A.
radios
B.
mobile phones
C.
electronic watches
查看完整题目与答案
【多选题】What are the differences between brown adipose tissue (BAT) and white adipose tissue (WAT)?
A.
In small vertebrates and hibernating animals, a significant proportion of the adipose tissue is brown adipose tissue (BAT), distinguished from white adipose tissue (WAT) by its smaller (diameter 20 to 40 μm), differently shaped (polygonal, not round) adipocytes.
B.
Like white adipocytes, brown adipocytes store TAGs, but in several smaller lipid droplets per cell rather than as a single central droplet. BAT cells have more mitochondria and a richer supply of capillaries and innervation than WAT cells, and it is the cytochromes of mitochondria and the hemoglobin in capillaries that give BAT its characteristic brown color.
C.
In brown adipocytes, fatty acids stored in lipid droplets are released, enter mitochondria, and undergo complete conversion to CO 2 by β oxidation and the citric acid cycle. The reduced FADH 2 and NADH so generated pass their electrons through the respiratory chain to molecular oxygen. In WAT, protons pumped out of the mitochondria during electron transfer reenter the matrix through ATP synthase, with the energy of electron transfer conserved in ATP synthesis.
D.
A unique feature of brown adipocytes is their production of uncoupling protein 1 (UCP1), also called thermogenin . This protein is responsible for one of the principal functions of BAT: thermogenesis. In BAT, UCP1 provides an alternative route for the reentry of protons that bypasses ATP synthase. The energy of the proton gradient is thus dissipated as heat, which can maintain the body (especially the nervous system and viscera) at its optimal temperature when the ambient temperature is relatively low.
查看完整题目与答案
相关题目：
【单选题】下列生理活动中，主要通过神经反射而完成的调节是？
A.
育龄期女性月经周期的正常进行
B.
肢体在受伤害性刺激时的回撤动作
C.
餐后血糖很快恢复正常水平
D.
正常人体的生长与发育过程
E.
大量出汗时引起尿量减少
查看完整题目与答案
【简答题】The Drink Your Body Needs Most 1 Our bodies are estimated to be about 60 to 70% water. Blood is mostly water, and our muscles, lungs, and brain all contain a lot of water. Water is needed to regulate ...
查看完整题目与答案
【多选题】威灵仙的原植物是
A.
威灵仙
B.
东北铁线莲
C.
棉团铁线莲
D.
铁皮威灵仙
E.
草本威灵仙
查看完整题目与答案
【单选题】Which mode account for most delivery in international trade? ( )
A.
By railway.
B.
By water.
C.
By air.
D.
By trucks.
查看完整题目与答案
【单选题】—Could you tell me ? —Certainly. [     ]
A.
what was the matter with my watch
B.
what the matter with my watch was
C.
what's the matter with my watch
D.
what the matter with my watch is
查看完整题目与答案
【单选题】下列生理活动中,主要通过神经反射而完成的调节是
A.
正常人体的生长和发育过程
B.
育龄期女性月经周期的正常运行
C.
肢体在受到伤害性刺激时的回撤动作
D.
餐后血糖很快恢复正常水平的过程
查看完整题目与答案
【简答题】-What makes her so frightened? -Oh, it is the mouse that she ___ on her bad while looking for her watch． [     ] A. came about B．came across C．came through D．came up
查看完整题目与答案
【判断题】后边工序在产品多加工的程度可以弥补前边工序少加工的程度,所以全部在产品的完工程序可以按50%平均计算。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which product has been the most successful in 2002?
A.
radios
B.
mobile phones
C.
electronic watches
查看完整题目与答案
【多选题】What are the differences between brown adipose tissue (BAT) and white adipose tissue (WAT)?
A.
In small vertebrates and hibernating animals, a significant proportion of the adipose tissue is brown adipose tissue (BAT), distinguished from white adipose tissue (WAT) by its smaller (diameter 20 to 40 μm), differently shaped (polygonal, not round) adipocytes.
B.
Like white adipocytes, brown adipocytes store TAGs, but in several smaller lipid droplets per cell rather than as a single central droplet. BAT cells have more mitochondria and a richer supply of capillaries and innervation than WAT cells, and it is the cytochromes of mitochondria and the hemoglobin in capillaries that give BAT its characteristic brown color.
C.
In brown adipocytes, fatty acids stored in lipid droplets are released, enter mitochondria, and undergo complete conversion to CO 2 by β oxidation and the citric acid cycle. The reduced FADH 2 and NADH so generated pass their electrons through the respiratory chain to molecular oxygen. In WAT, protons pumped out of the mitochondria during electron transfer reenter the matrix through ATP synthase, with the energy of electron transfer conserved in ATP synthesis.
D.
A unique feature of brown adipocytes is their production of uncoupling protein 1 (UCP1), also called thermogenin . This protein is responsible for one of the principal functions of BAT: thermogenesis. In BAT, UCP1 provides an alternative route for the reentry of protons that bypasses ATP synthase. The energy of the proton gradient is thus dissipated as heat, which can maintain the body (especially the nervous system and viscera) at its optimal temperature when the ambient temperature is relatively low.
查看完整题目与答案