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【简答题】
已知一组数据1，a，3，6，7，它的平均数是4，这组数据的众数是（ ）。
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皮皮学刷刷变学霸
举一反三
【单选题】James and Tom like rugby. Tim and Nicholas prefer football. Only Nicholas does not enjoy roller skating. Which of the following statements must be true?
A.
James and Tim like roller skating but not rugby.
B.
Nicholas and Tim prefer football and roller skating.
C.
Tom does not enjoy football or roller skating.
D.
James and Tom enjoy rugby and roller skating.
【单选题】以下各项诊断细菌性阴道病,哪一项是错误的
A.
分泌物均质、稀薄、白色
B.
阴道壁水肿、红斑
C.
线索细胞阳性
D.
阴道分泌物pH 值大于4.5
E.
胺臭味试验阳性
【简答题】It is believed that on Christmas Day, Saint Nicholas gave presents to good kids, and ______ to bad ones.
【单选题】It was the Dutch who brought the stories of Saint Nicholas to America.
A.
Y
B.
N
C.
NG
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