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【单选题】
在两样本均数比较的 检验中,无效假设是( ) 。A.
两总体均数相等
B.
两样本均数相等
C.
两总体均数不等
D.
两样本均数不等
E.
样本均数等于总体均数
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举一反三
【单选题】Why did Ed and Luke fall out?
A.
Luke only ordered one MP3 player.
B.
Ed only ordered one MP3 player.
C.
Luke wasn’t speaking to Ed.
【简答题】_____ (you listen) when I said you'd better leave early?
【单选题】What did Ed do after Luke left him?
A.
Persuaded Luke to stay.
B.
Found a new walking companion immediately.
C.
Continued the walk on his own
【简答题】Listen to the conversation and fill in the missing sentences. You'd better listen to it no more than THREE times.
【单选题】what did Ed do after Luke left him?
A.
Persuaded Luke to stay
B.
Found a new walking companion immediately
C.
Continued the walk on his own
【单选题】You'd better listen to the teacher carefully and take _________ when it is necessary.
A.
notes
B.
tickets
C.
signs
D.
words
【简答题】Record your own reading of new words list of passage A, unit 3 and post it in the ANSWER ZONE . Before recording, you'd better listen to the words first and then read all words reapedly until you can...
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