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【简答题】
直线垂 直于投影面投影重合为一点被称为 性 。
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【单选题】网站的主流技术路线主要有两类：一是基于Java 技术的J2EE体系结构，一是基于.net技术的体系结构。在基本理念上，J2EE强调（）
A.
免费性
B.
集成性
C.
封闭性
D.
开放性
【多选题】Cholesterol has several fates:
A.
Most of the cholesterol synthesis in vertebrates takes place in the liver. A small fraction of the cholesterol made there is incorporated into the membranes of hepatocytes, but most of it is exported in one of three forms: as bile acids, biliary cholesterol, or cholesteryl esters.
B.
Small quantities of oxysterols such as 25-hydroxycholesterol are formed in the liver and act as regulators of cholesterol synthesis.
C.
In other tissues, cholesterol is converted into steroid hormones (in the adrenal cortex and gonads, for example) or vitamin D hormone (in the liver and kidney).
D.
Such hormones are extremely potent biological signals acting through nuclear receptor proteins.
【简答题】飞机在（）中飞行比较平稳，阻力小，但因空气密度很小，故驾驶员操纵的反应力度也小，即可操纵性低于对流层。
【简答题】Dear Mr. Bush, Thank you for your 1 of January 5 for our Beauty Brand Blouses. We are now exporting 2 of various brands, among which Beauty Brand is the most famous. They are in great ## 3## abroad an...
【单选题】The main fate for cholesterol is
A.
be converted to fatty acids
B.
be converted to Vitamin D3
C.
be converted to steroid hormones
D.
be converted to bile acid
E.
be converted to cholesterol ester
【简答题】Reading comprehension (Reading in depth) (答案只需填写小写字母即可) 1 There is a passage with ten blanks. You are requested to select one word for each blank from a list of choices given in a word bank following ...
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【单选题】网站的主流技术路线主要有两类：一是基于Java 技术的J2EE体系结构，一是基于.net技术的体系结构。在基本理念上，J2EE强调（）
A.
免费性
B.
集成性
C.
封闭性
D.
开放性
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