三羧酸循环中底物水平磷酸化的反应是（） A.柠檬酸→α-酮戊二酸 B.琥珀酰CoA→

　　今年清明节后，网上盛传一篇民国小学生写的春游作文片段，“远处牧童三五，坐牛背上，吹笛唱歌。再前行，青山绿水，白鸟红花，杨柳垂绿，桃梅堆锦。仰望白云如絮，俯视碧草如毡。未几，炊烟四起，红轮欲坠，乃步行而回。”反观现在的小学生作文，多是以“天气晴朗，万里无云”开头，以“今天真是快乐而有意义的一天啊”的感叹结束。

　　给当代小学生写一段话，对他们写好作文提供一些帮助。要求：语言生动，有理有据，有启发性。（不超过50字）

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（2分）（2012•赤峰）科学探究常用到推理的方法，根据下列实验事实推出的结论正确的是（　　）

编号	实验事实	实验结论
A	某物质常温下是固体	该物质一定是晶体
B	某物质可以导电	该物质一定是金属单质
C	某反应有二氧化锰生成	该反应中二氧化锰一定是催化剂
D	某溶液与碘在一起显蓝色	该溶液中一定含有淀粉

社会主义消费方式主要有（）

A.个人消费方式

B.家庭消费方式

C.社会化消费方式

D.公共消费方式

E.集体消费方式

Part 4

Questions 26-45

·Read the following passage and choose the best word for each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
Do you want to send an e-mail message to the White House
Good luck.
In the past, (26) President Bush — or at least those assigned to read his mail — what was (27) your mind it was necessary only to sit down at a personal computer connected to the lnternet and (28) a note to president@ whitehouse.gov.
But this week, Tom Matzzie, an online organizer with the A.F.L.-C.I.O., discovered that (29) with the White House had become a bit more (30) . When Mr. Matzzie sent an e-mail protesting (31) a Bush administration policy, the message was bounced back With an automated reply, saying he had to send it again in a new way.
Under a system (32) on the White House Website (33) the first time last week, those who want to send a message to President Bush must now (34) as many as nine Web pages and (35) a detailed form that starts by asking whether the message sender supports White House policy (36) differs with it.
The white House says the new e-mail system is an effort to be more responsive (37) the public and offer the administration "real time" access (38) citizen comments.
Completing a message to the president also requires (39) a subject from the provided list, then entering a full name, organization, address and e-mail address. (40) the message is sent, the writer must wait for an automated response (41) his message, (42) whether the addressee intended to send the message. The message is delivered to the White House only after the person using that e-mail address (43) it.
"Over (44) , it’s a very cumbersome process," said Jakob Nielsen, an authority on Web design. "It’s probably designed deliberately to (45) on their e-mail.\

A．telling

B．to tell

C．tell

D．told

液压泵根据作用原理和结构特征可分为容积式泵、（）、流体动力泵。