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【单选题】
回溯法的效率不依赖于下列哪些因素( )A.
满足显约束的值的个数
B.
计算约束函数的时间
C.
计算约束函数的时间
D.
确定解空间的时间
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反馈参考答案：
举一反三
【单选题】He said that he ________ for Shanghai the next day.
A.
will leave
B.
has left
C.
would leave
D.
had left
【单选题】He said would never be intimidated ______ what he didn't like by big names.
A.
do
B.
to do
C.
did
D.
into doing
【单选题】听力原文：W: Two hours ago I saw Bob at a meeting. Is he home yet? M: No. He said he would be back at five and it's six o'clock already. Q: When did the woman see Bob? (3)
A.
2: 00.
B.
4: 00.
C.
5: 00.
D.
6: 00.
【简答题】燃油的物理特性有( )A. 粘度; B. 凝固点; C. 闪点; D. 密度;
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