设随机变量X的数学期望E(X)=μ,方差D(X)=σ2,则由切比雪夫不等式有P(X-μ|≥2σ)≤______.
第1题
A.However hard did I try
B.However hard I tried
C.However I tried har
D.However I had tried hard
第2题
A.However hard did I try
B.However hard I tried
C.However I trie
D.However had I tried hard
第3题
听力原文:W: Mr. Brown, I tried to memorize the script. but I keep forgetting the lines.
M: Look, Mary, you'll be fine if you stop putting so much pressure on yourself.
What's the man's attitude towards the woman?
A.Mary is not so forgetful.
B.Mary used to have good memory.
C.Mary shouldn't be so nervous.
D.Mary shouldn't try to memorize the whole script.
第4题
I could not persuade him to accept it, _____ the important of it.
(A) if only I could not (B) no more than I could (C) or I could not (D) nor could I
第5题
听力原文:W: Mr. Brown, I tried to memorize the script. but I keep forgetting the lines.
M: Look, Cathy, you'll be fine if you stop putting so much pressure on yourself.
Q: What does the man mean?
(18)
A.Cathy is not so forgetful.
B.Cathy used to have a good memory.
C.Cathy should not try to memorize the whole script.
D.Cathy shouldn't be so nervous.
第6题
A.I don’t think so
B.I hope so
C.I’m afraid not
D.I hope not
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