题干

若直线ax+my+2a=0(a≠0)过点(1,-3),则此直线的斜率为(  )

A:3

B:-3

C:33

D:-33

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D

同类题3

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    Twelve years ago, I arrived in Central Florida from Puerto Rico. I had heard of a job opportunity and decided to pursue it. But it never became a reality. I quickly learned that being alone without resources in an unfamiliar city was not a comfortable situation to be in.

    Once my limited funds ran out I became homeless and spent a year and a half living on the streets of Orlando. Apart from feeling not being noticed and missing my family, I had to face another challenge—hunger.

    For the first time in my life, I, as a foreign man, who had lived my life in the relative comfort of the middle class, understood the desperation someone feels when they don't get enough to eat. I clearly remembered having run a distance of more than 7 miles on many occasions just to make it to a local feeding program before they closed at 7 pm.

    Once the need for food was met, the next challenge would arise—where to find a place to sleep for the night. Fortunately, local programs like the Coalition for the Homeless, Second Harvest Food Bank and the Wayne Densch Center were an important part of my ability to survive my painful experience.

    With the assistance of these programs, I was accepted by a college scholarship program through the Coalition and obtained two degrees from Valencia.

    My experience has helped me understand that devoting my life to helping others offers lasting rewards. Today, I am employed as Childhood Hunger Programs Manager at Second Harvest Food Bank and oversee the summer feeding, Hi-Five Kids Pack, and Kids Café programs. I am so proud to be able to distribute food resources to those wonderful programs and help hundreds more like me.

同类题5

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    Let children learn to judge their work.____ If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make the necessary changes to make his language like other people's.____They learn to do without being taught to walk, run, climb, whistle, ride a bicycle, compare their own performances with those of more skilled people, and slowly make the needed changes.

    But in school we never give a chance to find out his mistakes and correct them by himself.____ We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

    If it is a matter of the right answer, as it may be in mathematics or science, give him the answer book.____Why should we teachers waste time on such routine work?____ Let the children learn what all educated people must some day learn, how to measure their own understanding, and how to know what they know or do not know.

A. Children leant to do all the other things in the same way.

B. Let him correct his own papers.

C. Point out his mistakes.

D. We do it all for him.

E. We allow him to learn from other children.

F. A child learning to talk does not learn by being corrected all the time.

G. Our job should be to help the child when he tells us that he can't find the way to get the right answer.