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【单选题】
标准误越大,表示此次抽样得到的样本均数A.
可靠程度越大
B.
抽样误差越大
C.
抽样误差越小
D.
可比性越差
E.
可比性越好
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举一反三
【单选题】It can't be Lucy's bike. Look! ______ is under the tree. A. She B. Her C. Hers D. She's
A.
1
B.
2
C.
3
D.
4
【单选题】It can't be Lucy's bike. Look! _______ is under the tree. [ ]
A.
She
B.
Her
C.
Hers
D.
She's
【单选题】Whose notebook is this? It ______ be Lucy's. Look! It has her name on it. [ ]
A.
might
B.
must
C.
could
D.
can't
【单选题】— Is that Lucy's cousin, Anna? — No, it ____ her. She has gone to Paris.
A.
mustn't be
B.
might be
C.
can't be
D.
could be
【单选题】—Whose book is this? —It _______ be Lucy's. Look, here is her name. [ ]
A.
may
B.
must
C.
can't
D.
need
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