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C Monday: Here I am, in the middle of nowhere. This camping trip idea is not getting off to a very good start. It’s raining and the tent leaks (漏). The hiking seemed to take forever, and I still can’t understand how it could all have been up hill! How did I ever let my brother persuade me into doing this? When we get home—if we ever get home—he’s going to have to do something great to get back on my good side. Maybe he should sponsor (赞助) a shopping spree(狂购)at the mall! Tuesday: Things are looking up. The sun came out today, so we were able to leave the tents and dry out. We’re camped at the edge of a small lake that I couldn’t see before because of the rain and fog. The mountains are all around us, and the forest is absolutely beautiful. We spent most of the day dragging out everything out of our backpacks or tents and putting it where the sun could dry it out. Later in the afternoon we tried to catch the fish for dinner, but the fish were smarter than we were. At night we built a fire and sang songs happily. Wednesday: We hiked to the far side of the lake and climbed to the top of a small peak. From there we could see how high the other mountains were and how far the forest spread around us. On the way up we passed through a snowfield! Thursday: I caught my first fish! We followed the stream that fed the lake. After about two miles, we came to a section (区域) that Carol said looked “fishy”. She had a pack rod (竿) , which can be carried in a backpack. I asked to cast (投掷) it, and I caught a fish on my first try. Carol caught a few more. But they were just too pretty to eat for lunch, so we put them back in the stream. Friday: I can’t believe we are going home already. It will be nice to get a hot shower, sleep in a real bed, and eat junk food, but the trip has been wonderful. We’re already talking about another camping adventure next year where we canoe (乘独木舟) down a river. It’s hard to believe, but I think this city girl has a little country blood in her veins. 小题1:The writer went on this camping trip because ____________. A.she enjoyed camping. B.she wanted to go fishing. C.she was influenced by her brother. D.she was tired of staying home. 小题2: The whole morning of Tuesday, the writer ____________. A.hiked along the lake. B.dried out her belongings. C.climbed the mountain. D.caught the fish for dinner. 小题3:It can be inferred that Carol had a pack rod with her because ____________. A.she could not afford to buy a regular fishing pole. B.she needed it to get their food. C.she thought the writer of the journal might need it. D.she expected to go fishing while they were hiking. 小题4: It is likely that the writer will ____________. A.go on another camping trip. B.invite Carol to go fishing together. C.make her brother buy her something. D.persuade her brother to go camping.
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【单选题】关于需求曲线,下列说法不正确的是 ( )。
A.
在序数效用论中,需求曲线的推导可以结合价格-消费曲线来完成
B.
需求曲线上的每个点都是能使消费者实现效用最大化的点
C.
一种商品的价格与其需求量间呈反方向变动的关系是由替代效应造成的
D.
在基数效用论与序数效用论中都可以推导出需求曲线
【多选题】How does the pyruvate dehydrogenase (PDH) complex work?
A.
The PDH complex is composed of multiple copies of three enzymes: pyruvate dehydrogenase, E 1 (with its bound cofactor TPP); dihydrolipoyltransacetylase, E 2 (with its covalently bound lipoyl group); and dihydrolipoyl dehydrogenase, E 3 (with its cofactors FAD and NAD).
B.
E1 catalyzes first the decarboxylation of pyruvate, producing hydroxyethyl-TPP, and then the oxidation of the hydroxyethyl group to an acetyl group. The electrons from this oxidation reduce the disulfide of lipoate bound to E 2 , and the acetyl group is transferred into thioester linkage with one –SH group of reduced lipoate.
C.
E 2 catalyzes the transfer of the acetyl group to coenzyme A, forming acetyl-Co E 3 catalyzes the regeneration of the disulfide (oxidized) form of lipoate; electrons pass first to FAD, then to NAD + .
D.
The long lipoyllysyl arm swings from the active site of E 1 to E 2 to E 3 , tethering the intermediates to the enzyme complex to allow substrate channeling.
【单选题】由消费者的( )可以推导出消费者的需求曲线
A.
价格-消费线;
B.
收入-消费线;
C.
生产扩展线;
D.
等斜线
【判断题】庞大的内容创业者群体是今日头条的重要特色之一。
A.
正确
B.
错误
【单选题】由门电路构成的施密特触发器如图所示,若需改变其回差电压,则下列描述正确的是 。【图片】
A.
增大R 1, 使 R 1> R 2
B.
减小R 2, 使 R 2< R 1
C.
改变R 1 与R 2 的比值,且 R 1< R 2
D.
以上方法均不正确
【单选题】How do you spell it?
A.
Yes. M-A-P map.     
B.
M-A-P map.          
C.
No, I don’t.
【单选题】由消费者的价格-消费曲线可以推导出消费者的( )。
A.
恩格尔曲线
B.
预算线
C.
无差异曲线
D.
需求曲线
【多选题】人民群众是历史的创造者,这是因为
A.
人民群众可以创造社会规律
B.
人民群众是生产力的体现者
C.
人民群众是物质财富的创造者
D.
人民群众是精神财富的创造者
E.
人民群众是实现社会变革的决定力量
【简答题】How to map PDH signal into SDH signal?
【判断题】由消费者的价格—消费曲线可以推导出恩格尔曲线
A.
正确
B.
错误
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