在“研究平抛物体的运动”的实验中记录的一段轨迹。已知物体是从原点O水平抛出,经测

题型:实验题

问题:

在“研究平抛物体的运动”的实验中记录的一段轨迹。已知物体是从原点O水平抛出,经测量C点的坐标为(60,45)。该物体运动的轨迹为一抛物线,其轨迹方程为     。g取10m/s2

考点:实验:探究弹力与弹簧伸长的关系实验:探究小车速度随时间变化的规律实验:探究加速度与力、质量的关系实验:探究功与速度变化的关系
题型:实验题

江苏省的行政中心是(  )

A.徐州

B.连云港

C.南京

D.苏州

题型:实验题

阅读理解。

     Some British and American people like to invite friends for a meal at home.

You should not be upset(不安的)if your English friends don't invite you home.

It doesn't mean they don't like you. 

     Dinner parties usually start between 7 and 8 p.m. and end at about 11. Ask

your hosts(主人)what time you should arrive. It's polite to bring flowers,

chocolates or a bottle of wine as a gift. 

     Usually the evening starts with drinks and snacks(小吃). If you want to be

extra polite, say how much you like the room, or the pictures on the wall. But

remember-it's not polite to ask how much things cost.

     In many families, the husband sits at one of the table and the wife sits at

the other end. They eat with their guests.

     You'll probably start the meal with soup or something small, then you'll

have meat or fish with vegetables, and then dessert(甜点心), followed by

coffee. It's polite to finish everything on your plate and to take more if you

want it.

     Did you enjoy the evening? Call your hosts the next day, or write them a

short "thank you" letter. British and American people like to say "thank you,

thank, thank you" all the time!

1. If your English friend doesn't invite you to dinner at home, it means he or she

                  .

A. doesn't like you

B. likes you

C. can't afford to do so

D. is too busy

2. It's impolite ______.

A. to ask about the price of a certain thing

B. to say "thank you" to hosts

C. take nothing with you when you are invited to dinner

D. to eat up everything on your plate

3. The meal ends with _______ usually.

A. soup

B. coffee

C. meat or fish

D. dessert

4. When you are invited to a dinner party, you'd better _______.

A. ask what time you should arrive

B. take your wife with you

C. drink as more as possible

D. eat more snacks as you can

5. Which of the following is true?

A. The hosts like the people who sit closer to them.

B. The hosts like the people who ask them time, price, age, etc.

C. The husband and the wife usually sit together.

D. You can call your host the next day or write a letter of thanks after that.

题型:实验题

黄芪与茯苓配伍用于利水消肿属于配伍七情中的()

A.相须

B.相使

C.相畏

D.相反

E.相恶

题型:实验题

家庭中的电灯、电视机、电风扇等用电器都是   联在电路中的.小林家4月底电能表读数为2708.7 kW•h,5月底电能表读数如图7所示,那么5月份他家消耗了   kW•h的电能.

题型:实验题

A/T的Power和Normal键功能是()。

A.Power指增加发动机动力

B.Normar指增加发动机动力

C.Power更省油

D.Normal更省油

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