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【判断题】
对于可测集,称其外测度不为测度A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】设二维随机变量(X，Y)的联合概率密度为 求： (Ⅰ)系数A； (Ⅱ)(X，Y)的联合分布函数； (Ⅲ)边缘概率密度； (Ⅳ)(X，Y)落在区域R：x＞0，y＞0，2x+3y＜6内的概率．
【简答题】下列四种电子构型的原子中(n=2、3、4)第一电离能最低的是( )。 (A) ns 2 np 3 (B) ns 2 np 4 (C) ns 2 np 5 (D) ns 2 np 6
【单选题】If you are really sleepy or tired, you can ( ).
A.
sleep as you like
B.
ask for a leave
C.
have a cup of coffee or tea
D.
gossip with colleague
【简答题】If you are really tired, you can stop______ (have) a rest for 10 minutes.
【单选题】听力原文：If you are really to become a good writer, what should you do? (12)
A.
To read more and more.
B.
To write more and more.
C.
To study more and more.
D.
To remember more and more.
【单选题】下列关于肾性高血压的描述错误的是
A.
指肾病变引起的血压增高
B.
肾实质缺血,肾素-血管紧张素-醛固酮系统被激活可引起肾素依赖性高血压
C.
限制水钠摄入或增加水钠排泄,应用血管紧张素转换酶抑制剂可改善高血压
D.
肾性高血压绝大多数是肾素依赖性的
E.
高血压发生或加重多是导致肾功能损害的重要因素,故应给予积极治疗
【单选题】'No, thanks, I don't smoke.' If you are really addicted to smoking and want to【C1】______, that may be the hardest thing you ever have to say. 'I don't smoke' has become an attitude of【C2】______ there ...
A.
give off
B.
give away
C.
give up
D.
give in
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