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【多选题】
What is the medical consequence when the peroxisomal system for fatty acid catabolism is defective due to genetic mutations?A.
The peroxisomal system is much more active on very-long-chain fatty acids such as hexacosanoic acid (26:0) and on branched-chain fatty acids such as phytanic acid and pristanic acid. These less-common fatty acids are obtained from dietary intake of dairy products, the fat of ruminant animals, meat, and fish. Their catabolism in the peroxisome involves several auxiliary enzymes unique to this organelle.
B.
The inability to oxidize these compounds is responsible for several serious human genetic diseases. Individuals with Zellweger syndrome are unable to make peroxisomes and therefore lack all the metabolism unique to that organelle.
C.
In X-linked adrenoleukodystrophy (XALD), peroxisomes fail to oxidize very-long-chain fatty acids, apparently due to lack of a functional transporter for these fatty acids in the peroxisomal membrane.
D.
Both defects lead to accumulation in the blood of very-long-chain fatty acids, especially 26:0. XALD affects young boys before the age of 10 years, causing loss of vision, behavioral disturbances, and death within a few years.
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【单选题】韶山8型电力机车轮对组装时采用注油压装，注油油压应在( )
A.
47～98 MPa
B.
98～147MPa
C.
147～198 MPa
D.
198～247 MPa
【单选题】对于冷拉钢筋来说，正确的概念应该是( )。
A.
钢筋的冷拉和冷拔只能提高其抗拉屈服强度，但抗压屈服强度将不能提高
B.
在设计中冷拉钢筋宜作为受压钢筋使用
C.
冷拉钢筋在加工时应该先焊接，然后才能进行冷拉
D.
钢筋的冷拉既可以提高其抗拉屈服强度，同时也能提高其抗压屈服强度，并且塑性性能降低很多
【简答题】颅骨骨折的形态学分类
【简答题】对于冷拉钢筋来说，正确的概念应该是()。 (A) 钢筋的冷拉和冷拔只能提高其抗拉屈服强度，但抗压屈服强度将不能提高 (B) 在设计中冷拉钢筋宜作为受压钢筋使用 (C) 冷拉钢筋在加工时应该先焊接，然后才能进行冷拉 (D) 钢筋的冷拉既可以提高其抗拉屈服强度，同时也能提高其抗压屈服强度，并且塑性性能降低很多
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