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【单选题】
卡方检验中自由度的计算公式是A.
行数 × 列数
B.
（行数 -1 ）（列数 -1 ）
C.
n-1
D.
N-k
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【简答题】简述协调训练基本方法
【单选题】In fact, the Iraq war was fairly______across the West.
A.
conversational
B.
contradictory
C.
contrary
D.
controversial
【单选题】According to the investigation, the D-train accident resulted from the fact that the authorities concerned didn’t _________ enough importance to the safety of the signal equipment.
A.
appeal
B.
adapt
C.
acquire
D.
attach
【单选题】Anyone who is in ________of weapons without permission is considered lawbreaking.
A.
command
B.
control
C.
charge
D.
possession
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