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问题 选择题

汽车做初速度为，加速度为a的匀加速直线运动，在t时间内的位移为，t秒末的速度为，则这段时间内的平均速度为（   ）

A．

B．

C．

D．

答案

BC

社平均速度为v，由可得平均速度为，同时由x=vt可知平均速度为，BC正确

阅读理解

读下面短文，画出家谱图 

    This is my friend John Wilson and his family. This is his grandfather. His name is Fritz. This is his grandmother. Her name is Evelyn. This is his mother. Her name is Anna. This is his father. His name is Earl. Earl’s parents are Fristz and Evelyn. These are his sisters, Christie and Carina.

 1. ______2. ______3. ______4. ______
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单项选择题 案例分析题

谢某，女，47岁。下痢反复发作4年余。三天前因食海鲜后，出现腹痛腹泻，大便每日三至四次，大便为黏液血便，纳食减少，倦怠怯冷，舌质淡苔白腻，脉虚数。

若此病人，久痢顽固不愈，证见心烦失眠，口干口苦，腹痛隐隐，喜温喜按，舌质淡，苔黄腻，脉沉细。治疗宜选用（）.

A.半夏泻心汤

B.葛根芩连汤

C.附子理中汤

D.乌梅丸

E.以上都不是
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