解关于xy的方程组ax+by=93x-cy=2时,甲正确解出x=2y=4,乙因把

题型:解答题

问题:

解关于x y的方程组
ax+by=9
3x-cy=2
时,甲正确解出
x=2
y=4
,乙因把c抄错了,误解为
x=4
y=-1
,求a、b、c的值.
考点:二元一次方程组的解法
题型:解答题

阅读理解。

     "Tell me and I forget. Teach me and I remember. Involve (使专心于) me and I learn." American scientist

and politician (政治家) Benjamin Franklin spoke these words in praise of teachers everywhere.

    Teachers' Day is a perfect chance for students around the world to express their thanks for their teachers.

    The festival doesn't fall on the same day around the world. In China, Teachers' Day is September 10. In

the US, teachers have a whole week. Teacher Appreciation (感谢) Week is celebrated every year in the-first

full week of May.

     Need some great ideas for impressing (给...极深的印象) your teachers on Teachers' Day? Write poems

(诗), letters or notes of thanks and leave them on your teachers' desks. Or plan an activity with your teachers

together after school, such as playing volleyball or soccer. This is a great way to relieve (减轻) stress.

     Feeling creative? Try some DIY gifts. Painting a thank-you mug (马克杯) is a good choice: Buy a

common mug and write words like "thank you" or "World's Greatest Teacher" with a special paint pen.

     A fingerprint (指纹) card is also a fun and meaningful Teachers' Day gift. First, press (按,压) your

ink-covered finger on a clean card. Second, use a pen to make your fingerprint look like an animal or a robot.

Third, write words like "you are a wonderful teacher," or, "thank you for teaching me". Your teachers will be

impressed by your creative idea. What are you waiting for? Pick up your art supplies and give your teachers

an unforgettable day.

1. "Tell me and I forget. Teach me and I remember. Involve me and I learn." ______ spoke these words

in praise of teachers everywhere.

A. Albert Einstein

B. Abraham Lincoln

C. George Washington

D. Benjamin Franklin

2. In America, Teachers' Day is ______.

A. September 10

B. May 10

C. in the first full week of September

D. in the first full week of May

3. According to the passage, which statement ISN'T true?

A. In the US, teachers have a whole week to celebrate Teachers' Day.

B. Teachers' Day doesn't fall on the same day around the world..

C. Writing poems isn't a great idea for impressing your teachers on Teachers' Day.

D. A fingerprint card is a fun and meaningful Teachers' Day gift.

4. Some DIY gifts can show you are ______.

A. energetic

B. hard-working

C. lazy

D. creative

5. The main idea of this passage is ______.

A. How to celebrate Teachers' Day for your teachers

B. what teachers do on Teachers' Day

C. what is the greatest Teachers' Day present

D. great holidays

题型:解答题

王师傅加工了一批零件,合格的有385个,不合格的有15个.这批零件的合格要是多少?

题型:解答题

关于充分就业的说法,下列正确的是()

A、充分就业就是百分之百就业

B、大多数西方经济学家认为存在4%-6%的失业率是正常的,这时社会经济就被认为处于充分就业状态

C、充分就业是指一切生产要素(不包含劳动)都有机会以自己愿意的报酬参加生产的状态

D、西方经济学家通常不以失业情况作为衡量充分就业与否的尺度

题型:解答题

贯彻“三个代表”重要思想的根本要求,也是“三个代表”重要思想的精神实质是()

A.关键在坚持与时俱进、核心在坚持执政为民、本质在坚持党的先进性

B.关键在坚持与时俱进、核心在坚持党的先进性、本质在坚持执政为民

C.关键在坚持执政为民、核心在坚持与时俱进、木质在坚持党的先进性

D.关键在坚持执行为民、核心在坚持党的先进性、本质在坚持与时俱进

题型:解答题

利用上杆钉或脚扣在杆上工作时,必须使用(),并扣好保安带(),方可开始工作。

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