以下哪项不是凉膈散的主治证( )A．烦躁口渴，面赤唇焦B．胸膈烦热，口舌生疮C．咽

“探究加速度与物体质量、物体受力的关系”的实验装置如图所示．

（1）此实验中，研究对象是            ，它受到的牵引力在满足条件           时，可认为等于悬挂物的重力大小。

(2)关于平衡摩擦力的说法正确的是（   ）

A．平衡摩擦力的实质是小车（及车上砝码）的重力沿木板方向的分力与木板与小车间、纸带与计时器间、绳与滑轮间、滑轮与轴间等摩擦力平衡

B．平衡摩擦力的实质是小车（及车上砝码）的重力沿木板方向的分力与小车和纸带所受的摩擦力平衡

C．平衡摩擦力要达到的标准时：在小桶的牵引下，小车带动纸带从长木板的一端向有定滑轮的另一端匀速滑下

D．平衡摩擦力办法是反复调节小桶中重物的多少和木板下所垫木块的厚度、位置E．去掉小桶和细绳，若小车拖着纸带沿长木板滑下时，打点计时器在纸带上打的点痕的距离是均匀的，就是算完成了“平衡摩擦力”

(3)在平衡小车与桌面之间摩擦力的过程中，打出了一条纸带如图所示．计时器打点的时间间隔为0.02 s．从比较清晰的点起，每5个点取一个计数点，量出相邻计数点之间的距离．该小车的加速度a＝______m/s².(结果保留两位有效数字)

(4)平衡摩擦力后，将5个相同的砝码都放在小车上．挂上砝码盘，然后每次从小车上取一个砝码添加到砝码盘中，测量小车的加速度．小车的加速度a与砝码盘中砝码总重力F的实验数据如下表：

砝码盘中砝 码总重力F(N)	0.196	0.392	0.588	0.784	0.980
加速度a(m·s－2)	0.69	1.18	1.66	2.18	2.70

请根据实验数据在图所示的坐标系中作出a－F的关系图象．

(5)根据提供的实验数据作出的a－F图线不通过原点．请说明主要原因．

“Have a nice day!” may be a pleasant gesture or a meaningless expression. When my friend Maxie says “have a nice day” with a smile, I know she sincerely cares about what happens to me. I feel loved and secure since another person cares about me and wishes me well.

“Have a nice day. Next!” this version of the expression is spoken by a salesgirl at the supermarket who is rushing me and my groceries out of the door. The words come out in the same tone (腔调)with a fixed procedure. They are spoken at me, not to me. Obviously, the concern for my day and everyone else’s is the management’s attempt to increase business.

The expression is one of those behaviors that help people get along with each other. Sometimes it indicates the end of a meeting. As soon as you hear it, you know the meeting is at an end. Sometimes the expression saves us when we don’t know what to say. “oh, you just had a tooth out? I’m terribly sorry, but have a nice day.”

The expression can be pleasant. If a stranger says “Have a nice day!” to you, you may find it heart-warming because someone you don’t know has tried to be nice to you.

Although the use of the expression is an insincere, meaningless social custom at times, there is nothing wrong with the sentence except that it is a little uninteresting. The salesgirl, the waitress, the teacher, and all the countless others who speak it without thinking may not really care about my day. But in a strange and comfortable way, it’s nice to know they care enough to pretend they care when they really don’t care all that much. While the expression may not often be sincere, it is always spoken. The point is that people say it all the time when they like.

小题1:How does the author understand Maxie’s word?

A．Maxie shows her anxiety to the author.

B．Maxie really wishes the author a good day.

C．Maxie encourages the author to stay happy.

D．Maxie really worries about the author’s security.小题2:What does the underlined sentence in Paragraph 2 mean?

A．The salesgirl is rude.

B．The salesgirl is bored.

C．The salesgirl cares about me.

D．The salesgirl says the words as a routine.小题3:By saying “Have a nice day,” a stranger may______.

A．try to be polite to you

B．express respects to you

C．give his blessing to you

D．share his pleasure with you.小题4:According to the last paragraph, people say “Have a good day” __________

A．sincerely

B．as thanks

C．as a habit

D．encouragingly小题5:What is the best title of the passage?

A．Have a Nice Day---- a Social Custom

B．Have a Nice Day----- a pleasant Gesture

C．Have a Nice Day----- a heart-warming Greeting

D．Have a Nice Day----- a polite ending of a Conversation

骨关节炎患者服阿司匹林后出现黑便，应首先考虑（）

A.食管静脉曲张破裂出血

B.急性胃炎出血

C.十二指肠溃疡出血

D.胃癌出血

E.反流性食管炎出血

患者干咳，连声作呛，痰少黏连成丝，不易咳出，痰中带血，喉痒，咽喉干痛，唇鼻干燥，口干，伴身热，微寒，头痛，鼻塞，舌苔薄黄，舌干少津，舌质偏红，脉浮数。其最佳选方是______。

A．桑杏汤
B．百合固金汤
C．养阴清肺汤
D．沙参麦冬汤

脊柱骨折固定时应使患者（）于硬板上，不移位。

A.仰卧

B.俯卧

C.左侧卧位

D.右侧卧位