带电粒子运动时穿过电场的径迹如图中的虚线所示，不考虑重力和空气阻力，在由电场中的

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空。

     There is a popular belief among parents      1    schools are no longer interested in spelling. No

school  in     2   I have ever taught has ever ignored spelling or considered it unimportant as a basic

skill. There are, however, different ideas about how to teach it, or how much priority(优先) it must

be given over general language development and writing ability. The problem is how to encourage a

child to express himself freely and confidently in writing     3        holding him back.

      If spelling becomes the only focal(焦点的) point of his teacher's interest, clearly     4   bright child

will be likely to "play safe". He will tend to write only words within his spelling range,     5     (choose)

to avoid  adventurous language. That's why teachers often encourage the early use of dictionaries and

pay attention to content rather than technical ability.

    Once I    6     (shock) to read on the bottom of a sensitive piece of writing about a personal

experience. "This work is horrible! There are far too many spelling errors and your writing is terrible.

"   7   may have been a sharp criticism of the pupil's technical abilities in writing, but it was also a sad 

    8   (reflect) on the   teacher who had omitted(忽视) to read the essay,    9   there existed some

beautiful expressions of the     child's deep feelings. The teacher was not wrong to draw attention to

the errors,    10   if his priorities had centered on the child's ideas, an expression of his disappointment

with the presentation would have given    the pupil more motivation to seek improvement.

为了探究受到空气阻力时，物体运动速度随时间的变化规律，某同学采用了“加速度与物体质量、物体受力关系”的实验装置（如图所示）。实验时，平衡小车与木板之间的摩擦力后，在小车上安装一薄板，以增大空气对小车运动的阻力。

（1）往砝码盘中加入一小砝码，在释放小车______________ （选填“之前”或“之后”）接通打点计时器的电源，在纸带上打出一系列的点。

（2）从纸带上选取若干计数点进行测量，得出各计数点的时间t与速度v的数据如表：

请根据实验数据作出小车的v-t图像。

（3）通过对实验结果的分析，该同学认为：随着运动速度的增加，小车所受的空气阻力将变大。你是否同意他的观点？请根据v-t图像简要阐述理由。

“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 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 words?

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 respect 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 nice 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

图反映的是某月30°N附近气压分布状况，回答题。

该气压分布状况的月份可能是（）

A．1月

B．4月

C．7月

D．10月

氢氧化钙( )

A．O/W型固体粉末乳化剂
B．W/O型固体粉末乳化剂
C．口服乳剂
D．外用乳剂
E．注射用乳剂