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【单选题】
某复杂电路计算结果是：I2＝2A，I3＝-3A，这个结果表明（）。A.
电流I2和I3的方向相反
B.
电流I2大于电流I3
C.
电流I3大于电流I2
D.
I2是从电源正极流出的电流
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举一反三
【简答题】练习 1 风景照色调的调整 打开练习 1 素材 .jpg 文件,如图 5-47 所示,调整照片,如图 5-48 所示。
【单选题】It was the young scientist ___ solved this problem five years ago.
A.
who
B.
whom
C.
which
D.
Both A and C
【简答题】This famous scientist ________________ at home by his mother when he was young.
【简答题】A young man asked Albert Einstein, the great German scientist , what the secret of success is. The scientist told him that the secret of success is hard work. A few days later the young man asked the ...
【单选题】This young scientist is not only intelt ________ hardworking.
A.
and
B.
but
C.
also
D.
so
【简答题】打开 part4\ 练习 1 素材 .bmp 文件,如图 4-58 所示。使用 Photoshop 提供的工具对人像素材进行修饰。
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