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【单选题】
小儿无尿标准是A.
24小时尿量＜10ml
B.
24小时尿量＜30ml
C.
24小时尿量＜50ml
D.
24小时尿量＜70ml
E.
24小时尿量＜90ml
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举一反三
【单选题】Why do Americans choose a Monday to celebrate President’s Day? ( )
A.
Because of the influence of the Uniform Monday Holiday Act.
B.
Because people want to celebrate all U.S. presidents past and present.
C.
Because President George Washington was born on Monday
D.
none of the above
【简答题】设u(x，y)，v(x，y)是由方程组所确定的隐函数，则分别为( ) A． B． C． D．设u(x，y)，v(x，y)是由方程组 所确定的隐函数，则 分别为( )
【单选题】The author s purpose in writing this passage is to______.
A.
warn people not to celebrate Halloween any more
B.
criticize the Halloween celebration activities
C.
tell people to be careful in deciding whether to celebrate Halloween
D.
promote the tradition of Halloween and its celebrations
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