发动机涡轮机匣冷却（TCC）空气活门作动器的驱动力来自：（）A、飞机电源系统 B、飞机

化学实验室常用甲酸（一种液态物质，化学式为HCOOH）和浓硫酸混合加热制备一氧化碳，其反应方程式为：HCOOH

浓H2SO4

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CO↑+H₂O．如图是制备CO，再用CO还原氧化铁并检验反应产物的实验装置．

（1）根据“小资料”中的内容分析：如果实验室想收集CO气体，你认为用何种方法比较好______．（填字母代号）

A．排水收集法  B．向上排空气法  C．向下排空气法  D．排水法和向下排空气法均可

（2）实验前先检查______；实验C处，实验前应检验______，以防爆炸．

（3）为了使实验能顺利进行，装置B中盛放______（填名称）；

装置D中盛放______（填溶液名称），以检验______；

（4）实验结束时应先停止______处加热（填字母代号）．

（5）反应后将磁铁悬挂在玻璃管上方，其作用是______．

（6）写出C中硬质玻璃管中发生化学反应的方程式______．

A famous study was done in a school by a professor from a university．At the start of the school year，the teachers were given the names of five children．They were told that these five were the most excellent students in the class．But the fact was that these students were only average，and they were not the best students at all．Well，guess what? At the end of the year，all the five average students scored among the highest in the class．

What made these average students change so much to become top students? The only difference was the change in their teachers’ attitude．Because the teachers believed that these five kids were the top students，they expected more from them．And so these five average students began to believe and expect more from themselves．So they worked harder to do as well as they could．

Do you know? If you expect the best from people，they’ll usually want to give you their best．A great leader said，“Treat a person just how he appears to be on the outside，and you’ll make him even worse．But treat a person like he’s already a success，and you’ll help make him the best he can be．”

Like the true story of 7-year-old Johnny，his teacher got so angry with him that one day she said，“Johnny，you’re the naughtiest(最顽皮的) boy in this class．I’m sure you’ll never change．”The next year Johnny had a new teacher．And on the first day of class，she met with Johnny after school and said，“Johnny，I’ve heard a lot about you! But do you know that I don’t believe a word of it．”And every day after that，this new teacher treated Johnny as if he was one of the smartest students even when Johnny did naughty things．Later on，Johnny became a school leader．Because that’s the power of our belief and attitude toward children．

1．The professor started his research by ________．

A．telling the five students to work harder than ever before

B．teaching the five children himself

C．telling the teacher the five students were the best in the class

D．asking the five children to find a new teacher

2．The five average students became top students mainly because of ________．

A．the professor’s study     B．the change in the professor’s attitude

C．the teachers’ hard work   D．the change in the teachers’ attitude

3．Why did the writer tell us the story of 7-year-old Johnny?

A．To show the importance of encouragement．

B．To show that the boy was clever enough．

C．To let us know the famous boy．

D．To let us know how good his new teacher was．

4．According to the story，we can learn that ________．

A．the research began at the end of the school year

B．the students scored highest only because they worked hard

C．if you expect the most from people，you’ll get the least

D．little Johnny liked his new teacher very much

5．What does the passage mainly tell us?

A．If you want to get more，you should have new teachers．

B．Attitude and belief can change a person．

C．A professor’s study can help you score highest．

D．Only teachers can make you a top student．

贯彻婚姻法运动

出现临床症状时。血小板的数量一般低于（）

A.200×10⁹／L

B.70×10⁹／L

C.120×10⁹／L

D.150×10⁹／L

E.170×10⁹／L

在窗体上有一个“背景色变换”按钮和一个“结束”按钮。单击“背景色变换”按钮，背景色变为红色；再单击，背景色变为绿色；再单击，背景色变为蓝色；再单击背景色变为红色 ……如此循环。单击“结束”按钮，程序运行结束。请填空。　　Private Sub cmdChange_Click()　　　If Mark=0 Then　　　　【 】　　　　　Mark=1　　　　ElseIf【 】Then　　　　Forml．BackColor=vbGreen　　　　Mark=2　　　　ElseIf Mark=2 Then　　　　Form1．BackColor；vbBlue　　　　【 】　　　　End If　　End Sub　　Private Sub cmdExit_Click()　　　End　　End Sub