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【单选题】
比例阀是按（）原理工作的，靠使其输出稳定（）
A.
位移平衡，正反馈
B.
力平衡，负反馈
C.
力矩平衡，正反馈
D.
力平衡，正反馈
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参考解析：
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举一反三
【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】接上例,用买的话,年成本为多少?
A.
$280,000
B.
$370,000
C.
$460,000
D.
$490,000
查看完整题目与答案
【单选题】1991年12月卫生部颁布了中华人民共和国卫生部令(第十八号)是
A.
《首批淘汰三十五项临床检验项目、方法的规定》
B.
《首批淘汰三十六项临床检验项目、方法的规定》
C.
《首批淘汰三十八项临床检验项目、方法的规定》
D.
《首批淘汰三十九项临床检验项目、方法的规定》
E.
《首批淘汰三十九项落后临床检验项目、方法的规定》
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【单选题】下面哪一项是拥有志同道合团队的首要条件?()
A.
互补的资源优势
B.
各自的知识储备
C.
共同的目标
D.
共同的价值取向
查看完整题目与答案
【简答题】描述现浇混凝土拱桥的几个施工阶段。
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】What do most desert animals do at night?
A.
They are active in their search for food and water.
B.
They go underground to find food.
C.
They build new shady place to avoid the coming day’s sun rays.
D.
They take a rest in the cool and safer darkness.
查看完整题目与答案
【判断题】孔子认为大多数人的意见有时并不能成为评判一个人的标准。( )
A.
正确
B.
错误
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
【判断题】为使岸边集装箱起重机获得良好调速性能,各工作机构一般采用直流电动机驱动。( )
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【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】接上例,用买的话,年成本为多少?
A.
$280,000
B.
$370,000
C.
$460,000
D.
$490,000
查看完整题目与答案
【单选题】1991年12月卫生部颁布了中华人民共和国卫生部令(第十八号)是
A.
《首批淘汰三十五项临床检验项目、方法的规定》
B.
《首批淘汰三十六项临床检验项目、方法的规定》
C.
《首批淘汰三十八项临床检验项目、方法的规定》
D.
《首批淘汰三十九项临床检验项目、方法的规定》
E.
《首批淘汰三十九项落后临床检验项目、方法的规定》
查看完整题目与答案
【单选题】下面哪一项是拥有志同道合团队的首要条件?()
A.
互补的资源优势
B.
各自的知识储备
C.
共同的目标
D.
共同的价值取向
查看完整题目与答案
【简答题】描述现浇混凝土拱桥的几个施工阶段。
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】What do most desert animals do at night?
A.
They are active in their search for food and water.
B.
They go underground to find food.
C.
They build new shady place to avoid the coming day’s sun rays.
D.
They take a rest in the cool and safer darkness.
查看完整题目与答案
【判断题】孔子认为大多数人的意见有时并不能成为评判一个人的标准。( )
A.
正确
B.
错误
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
【判断题】为使岸边集装箱起重机获得良好调速性能,各工作机构一般采用直流电动机驱动。( )
A.
正确
B.
错误
查看完整题目与答案