目前已知参与酶促褐变的氧化酶主要是()或(),底物是食品中的一些酚类、黄酮类化合物的

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问题:

目前已知参与酶促褐变的氧化酶主要是()或(),底物是食品中的一些酚类、黄酮类化合物的单宁物质

考点:食品科学技术食品工艺学食品工艺学题库
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已知a-2=
9
4
且a>0,则log
2
3
a
=______.
题型:填空题

试题二(共15分)阅读以下说明,回答问题1至问题6,将解答填入答题纸对应的解答栏内。【说明 】某公司总部服务器1的操作系统为Windows Server 2003,需安装虚拟专用网 (VPN)服务,通过Internet与子公司实现安全通信,其网络拓扑结构和相关参数如图2-1所示。

【问题 1】(2 分)在Windows Server 2003的“路由和远程访问”中提供两种隧道协议来实现VPN服务: (1) 和L2TP,L2TP 协议将数据封装在 (2) 协议帧中进行传输。

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在分组检索中,要去掉不满足条件的分组和不满足条件的记录,应当()

A.使用WHERE子句

B.使用HAVING子句

C.先使用HAVING子句,再使用WHERE子句

D.先使用WHERE子句,再使用HAVING子句

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Caesar was right. Thin people need watching. I’’ve been watching them for most of my adult life, and I don’’t like what I see. When these narrow fellows spring at me, I quiver to my toes. Thin people come in all personalities, most of them menacing. You’’ve got your "together" in person, your mechanical thin person, your condescending thin purism, your tsk-tsk thin person, your efficiency-expert thin person. All of them are dangerous.In the first place, thin people aren’’t fun. They don’’t know how to goof off, at least in the best, fat sense of the word. They’’ve always got to be adoing. Give them a coffee break, and they’’ll jog around the block. Supple them with a quiet evening at home, and they’’ll fix the screen door and lick S & H green stamps. They say things like "there aren’’t enough hours in the day". Fat people never say that. Fat people think the day is too damn long already.Thin people make me tired. They’’ve got speedy little metabolisms that cause them to bustle briskly. They’’re forever rubbing their bony hands together and eyeing new problems to "tackle". I like to surround myself with sluggish, inert, easygoing fat people, the kind who believe that if you clean it up today, it’’ll just get dirty again tomorrow.Some people say the business about the jolly fat person is a myth, that all of us chubbies are neurotic, sick, sad people. I disagree. Fat people may not be chortling all day long, but they’’re a hell of a lot nicer than the wizened and shriveled. Thin people turn surly, mean, and hard at a young age because they never learn the value of a hot-fudge sundae for easing tension. Thin people don’’t like gooey soft things because they themselves are neither gooey nor soft. They are crunchy and dull, like carrots. They go straight to the heart of the matter while fat people let things stay all blurry and hazy and vague, the way things actually are. Thin people want to face the truth. Fat people know there is no truth. One of my thin friends is always staring at complex, unsolvable problems and saying, "The key thing is fat people never say that." They know there isn’’t any such thing as the key thing about anything.

Which of the following statements can best describe the behavior of most thin people as ascribed by the passage

A.Thin people could never find themselves having enough time for leisure.

B.Thin people are seldom unable to find themselves having nothing to do.

C.Thin people are never lazy in doing things useful.

D.Thin people are fussily annoying and particularly disgusting.

题型:填空题

常用于井下套管或裸眼里封隔油气水层段的专用工具是()。

A.油管规

B.封隔器

C.悬挂器

D.通井规

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