问题
单项选择题
暴露与疾病由于有共同的原因而产生的关联是（）。
A.间接因果关联
B.继发关联
C.直接因果关联
D.偶然关联
E.统计学关联
答案
参考答案：B
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暴露与疾病由于有共同的原因而产生的关联是（）。
A.间接因果关联
B.继发关联
C.直接因果关联
D.偶然关联
E.统计学关联
参考答案：B
| 阅读理解 | |
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| 1. The Music Store _____. | |
| A. will open on June 15 B. is having a summer sale C. has sale prices only in summer D. will close after summer | |
| 2. What records and tapes in the store are on sale? | |
| A. Disco. B. Rock. C. Jazz and Country. D. All of them. | |
| 3. If you buy a tape whose list price is $7.98 during the sale, how much can you save? | |
| A. $3.50 B. $1.50 C. $4.50 D. $6.48 | |
| 4. The sale will last _____. | |
| A. 10 days B. 15 days C. a week D. three weeks | |
| 5. Which of the following is TRUE? | |
| A. The last day of the sale is June 15. B. Special prices are just for special men. C. You can't buy things over the phone. D. There is no phone in the strore. |