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【单选题】
牛磺酸是下列哪一种氨基酸衍变而来的?A.
甲硫氨酸
B.
半胱氨酸
C.
苏氨酸
D.
甘氨酸
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举一反三
【简答题】Last year Mike earned ________ his brother, though his brother has a better position. A) twice as much as B) twice as many as C) twice than D) twice as more as
【简答题】阅读理解。 Jack is six years old. He has no sisters. But he has a brother. His brother's name is Mike. Jack likes eating apples, oranges and bananas. Sometimes he eats some of his brother's apples. And his...
【单选题】He has a brother .(改一般疑问句)
A.
Has he a brother?
B.
Is he has a brother?
C.
Does he have a brother?
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