(8分)某同学在做练习使用示波器实验,发现示波器上显示如图甲,为了将这个波形变成

题型:实验题

问题:

(8分)某同学在做练习使用示波器实验,发现示波器上显示如图甲,为了将这个波形变成如图乙所示的波形,可进行如下调节:(填旋钮或开关编号&s.5*u.c.om

(1)调节       使图象变细;

(2)调节             使图象位于示波器显示屏的中央;

(3)调节        增大波形曲线竖直方向的幅度;

(4)调节        使图象从负半周开始。

考点:实验:伏安法测电阻实验:练习使用示波器实验:测绘小灯泡的伏安特性曲线实验:探究影响导体电阻的因素
题型:实验题

最重要的必需脂肪酸是()

A.亚油酸

B.α–亚麻酸

C.花生四稀酸

D.丁酸

E.棕榈酸

题型:实验题

男,67岁,感染性休克24小时,测动脉血气分析示:pH30,PaCO3kPa(40mmHg),PaO26kPa(80mmHg),BE-3mmol/L,HCCO3-13mmol/L。其存在的酸碱紊乱类型为

A.呼吸性碱中毒

B.呼吸性碱中毒合并代谢性酸中毒

C.失代偿性呼吸性酸中毒

D.失代偿性代谢性酸中毒

E.代谢性碱中毒

题型:实验题

.

Driving to a friend's house on a recent evening, I was attracted by the sight of the full moon rising just above my friend’s rooftops. I stopped to watch it for a few moments, thinking about what a pity it was that most city people? Myself included? Usually miss sights like this because we spend most of our lives indoors.

My friend had also seen it. He grew up living in a forest in Europe, and the moon meant a lot to him then. It had touched much of his life.

 I know the feeling. Last December I took my seven-year-old daughter to the mountainous jungle of northern India with some friends. We stayed in a forest rest-house with no electricity or running hot water. Our group had campfires outside every night, and indoors when it was too cold outside. The moon grew to its fullest during our trip. Between me and the high mountains lay three or four valleys. Not a light shone in them and not a sound could be heard. It was one of the quietest places I have ever known, a bottomless well of silence. And above me was the full moon, which struck me deeply.

Today our lives are filled with glass, metal, plastic and fibre-glass. We have televisions, cell phones, pagers, electricity, heaters and ovens and air-conditioners, cars, computers.

Struggling through traffic that evening at the end of a tiring day, most of it spent indoors, I thought: before long, I would like to live in a small cottage. There I will grow vegetables and read books and walk in the mountains And perhaps write, but not in anger. I may become an old man there, and wear the bottoms of my trousers rolled and measure out my life in coffee spoons. But I will be able to walk outside on a cold silent night and touch the moon.

71.The best title for the passage would be______.

A. Touched by the moon

B. The pleasures of modern life

C. A bottomless well of silence

D. Break away from modern life

72. The writer felt sorry for himself because________.

A. there was too many pollution

B. he failed to see the fullest moon

C. he didn’t adapt to modern inventions

D. there were too accidents on the road

73. What impressed the writer most in the mountainous jungle of northern India?

A. No modern equipment     B. Complete silence.

C. The nice moonlight        D. The high mountains

74. Modern things (Paragraph 4) are mentioned mainly to______.

A. show that the writer likes city life very much

B. tell us that people greatly benefit from modern life

C. explain that people have less chances to enjoy nature

D. show that we can also enjoy nature at home through them

75. The author wrote the passage to_______.

A. express the feeling of returning to nature

B. show the love for the moonlight

C. advise modern people to learn to live

D. want to communicate longing for modern life

题型:实验题

血站违反献血法规定,向医疗机构提供不符合国家规定标准的血液的,应当()

A.由县级以上卫生行政部门处以罚款

B.由县级以上卫生行政部门责令改正

C.由县级以上卫生行政部门限期整顿

D.依法赔偿

E.依法追究刑事责任

题型:实验题

徒手防卫技术中综合防护技术有()

A.格挡

B.搂抓

C.提膝

D.闪躲

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