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【单选题】
对两组平均数进行差异的显著性检验时 , 在下面哪种情况下不需要进行方差齐性检验 ?A.
两个独立样本的容量相等且小于 30;
B.
两个独立样本的容量相等且大于 30;
C.
两个独立样本的容量不等， n1 小于 30, n2 大于 30;
D.
两个独立样本的容量不等， n1 大于 30, n2 小于 30
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反馈参考答案：
举一反三
【简答题】Sue：Hmm．There’s no 4 ．
【单选题】— How was ______ dinner at Sue’s house? — It was great. Sue’s mum is _______ good cook.
A.
the; /
B.
the; a
C.
a; the
D.
a; a
【简答题】完形填空。 It is Saturday morning. Sue __ 1 __ breakfast. Sue's mother and father are with her. On Saturday morning Sue __ 2 __ go to school. She helps her mother and father __ 3 __ home. This morning, s...
【单选题】Nomatter where Sue goes, something major happens; it's like she takes the _______along with her.
A.
drama
B.
romance
C.
tragedy
D.
comedy
【单选题】下列哪个（些）说法是错误的？ Ⅰ．IP协议提供的是面向连接的可靠服务 Ⅱ．TCP协议提供的是无连接不可靠服务 Ⅲ．UDP协议提供的面向连接的可靠服务 Ⅳ．IP协议提供的是无连接不可靠服务
A.
全部
B.
Ⅰ和Ⅲ
C.
Ⅱ、Ⅲ和Ⅳ
D.
Ⅰ、Ⅱ和Ⅲ
【简答题】完形填空。 It is Saturday morning. Sue 1 breakfast. Sue's mother and father are with her. On Saturday morning Sue 2 go to school. She helps her mother and father 3 home. This morning, she says to h...
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