3个3口之家一起观看演出，他们购买了同一排的9张连座票，则每一家的人都坐在一起的不同坐法有（）
A. （3!）2种
B. （3!）3种
C. 3（3!）3种
D. （3!）4种
E. 9!种
农药品种较多，吸入过多引起中毒时，用碘解磷定解救无效的农药为
A. 马拉硫磷
B. 内吸磷
C. 敌敌胃
D. 对硫磷
E. 乐果
下列哪些药物易发生风化
A. 牛膝
B. 天冬
C. 红花
D. 双花
E. 芒硝
Why did participants feel frightened even though there was no shock going with blue squares
A. Because they experienced the first-hand fear.
Because they learned fear indirectly.
C. Because their brains were sensitive to colors.
D. Because their reacting system were monitored.
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