练习题

C. where D. which 24. A .thought B. hit C .caught D. had 25. A. shop B. farm C hospital D. village Ⅲ .阅读理解。 （ 20 分） A The students were having their chemistry（化学 ） class. Miss Li was telling the

B. snowed C. was windy D. was sunny ( ) 27. When Mrs Black was in the kitchen, Joe was ______. A. listening to music B. helping clean the house C. doing his homework D. watching TV ( ) 28. What does

____ they ______? , live ,live in live in 七．完形填空 There is good news for the children in the countryside. We may still remember the girl 1 big eyes. Her big eyes are 2 us her dream: I wish to 3 ! In

早饭 (6)吃午饭___________________ (7)吃晚饭 (8)休息一下_________________ (9)睡觉 (10)谈话 __________________ (11)八点半 ___________________ (12)一节英语课______________ (13)在十点钟 _________________ (14)… 怎么样 ?_______________

to that city several times. A. have been B. has been C. have gone D. has gone 25. The Greens _______ Tianjin since 2020. A. have been in B. have been to C. have gone in D. have gone in 26. Everyone

sica. Jessica’s leg was cut off at the knee because of cancer. She was learning to wear a prosthesis (假肢 ). Jessica told about playing soccer. She hit the ball hard 7 her foot. The ball flew off in

A. clean B. dirty C. clear D. pure 10. My mother told me lies. A. not to tell B. to not tell C. no telling D. tell Ⅱ .根据描述，找出对应项（ 5分） A. brown or black ,live in the forest a. camel B. very big， live

的 4倍，长方形的面积多少。 一批纸共 120张，第一次用去它的 61 ，第二次用去它的 53。 两次共用去这批纸的几分之几。 两次共用去多少张。 分数除法的意义（二） 姓名： 一、细心填写： 83247。 3表示：（ ） 根据83

Li Ming lives in China. ( )44. Ms. Liu is Li Ming’s Chinese teacher. ( )45. Danny likes China. Ⅴ . 阅读理解（ 10 分） My name is Bruce. I’m a boy. I’m from Canada. I live in Beijing now. This is my friend.

． (1)各方案的期望收益率、方差、标准差及标准离差率： A B C D 期望收益率 R 标准差 σ 标准离差 CV % % % % % % % % % (2)方案 A无风险，方案 D的期望收益率较高，且风险较小，所以方案 A和方案 D一般来说是不能淘汰；对方案 B 和方案 C 来说， RBRc，σ Bσ c。 但 CVB CVc ， 仅从前两个指标很难判断，但通过 CV，可知方案