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【单选题】
使二次根式 有意义的x的取值范围是 [     ]
A.
x=1
B.
x≠1
C.
x＞1
D.
x≥1
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【简答题】VI. Calvin waited outside Trudy’s bedroom. Then it happened—a scream, a very loud scream. Calvin ran to his room and dived into bed. He heard Mama coming down the hall. “Did you do this?” his mother a...
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