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【简答题】
Directions: Fill in the blanks with the words or expressions given below. Change the form where necessary. (1) He escaped without a . (2) If you do not to excellence, you will never achieve it. (3) Everyone has the freedom to their dreams. (4) He didn’t attend the party for a of reasons. (5) The judge declared him . (6) He wrote down the of his lecture. (7) Let me your telephone number so that I can call you later. (8) Learning foreign languages is just an with me. (9) He is bored and needs a little in his life. (10) The committee tried to the bill through at the meeting.
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【单选题】郭女士，关节肿胀、疼痛3年，考虑为类风湿性关节炎。目前口服阿司匹林治疗。 类风湿性关节炎的临床特征不包括（ ）
A.
近端指间关节肿痛
B.
远端指间关节肿痛
C.
四肢关节对称性肿痛
D.
掌指关节肿痛
E.
腕关节肿痛
【简答题】设随机变量X的分布律为 X -2 -1 0 1 3 p k frac{1}{5} frac{1}{6} frac{1}{5} frac{1}{15} frac{11}{30} 求Y=X 2 的分布律．
【简答题】设随机变量X的分布律为 X -1 0 frac{1}{2} 1 2 P frac{1}{3} frac{1}{6} frac{1}{6} frac{1}{12} frac{1}{4} 则EX=( )；E(1-X)=( )；EX 2 =( )
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