(A)某天文台测得某行星的一颗卫星绕行星做匀速圆周运动,测得其轨道半径为R,周期

题型:填空题

问题:

(A)某天文台测得某行星的一颗卫星绕行星做匀速圆周运动,测得其轨道半径为R,周期为T,则其向心加速度为______;行星的质量为______.(万有引力恒量为G)

(B)如图所示,质量m1=0.3kg 的小车静止在光滑的水平面上,车长L=15m,现有质量m2=0.2kg可视为质点的物块,以水平向右的速度v0=2m/s从左端滑上小车,最后在车面上某处与小车保持相对静止.物块与车面间的动摩擦因数μ=0.5,则小车的最大速度是______ m/s;物块在车面上滑行的时间是______ s.

考点:匀变速直线运动的位移与时间的关系人造地球卫星万有引力定律的其他应用牛顿第二定律
题型:填空题

某女,30岁,发现外阴部肿物5天,自觉外阴坠胀感。妇科检查:左侧大阴唇后部有一约6cm×6cm×5cm大小的囊性肿物,无压痛。最恰当的治疗为()

A.前庭大腺囊肿剥出术

B.前庭大腺囊肿造口术

C.全身应用抗生素

D.高锰酸钾坐浴

E.针刺吸出囊液

题型:填空题

ERG理论的主要特点是( )。

A.它不强调需要层次的顺序

B.认为某种需要在一定时间内对行为起作用

C.认为某种需要在得到基本满足后.其强烈程度会减弱

D.当较高级需要受到挫折时,个体可能会降而求其次

E.个体在一种需要得到满足后,可能去追求更高层次的需要

题型:填空题

阅读理解

     I used to be frustrated when I got "trapped" in the train station in New York. When this happened,

I spent time "observing" people and found that the New York City trains formed "an underground

"NYC".

     I met all kinds of people there. Sitting in the trains coming from suburban like Queens and Brooklyn,

I saw babysitters and house keepers, in white or pink uniforms, carrying a shopping bag with lunch and

another prettier bag for their makeup. Some gentlemen in suits get squeezed in between ladies, reading

the New York Times, holding Starbucks coffees and a piece of napkin.  

     The passengers' skin color would get lighter as the train went from suburban areas to uptown NYC.

Clothes brands changed from "Nike" and "Babyphat" to "Armani" and "Prada".  

    Getting lost is not embarrassing at all. Even New Yorkers who have lived in the city for 20 years need

to check out the map before going to a new place by train. People from other states are just as confused

as foreigners when they are "thrown" underground.  

     It was funny when people carrying big backpacks and holding maps, asked me where they could

transfer while I was trying to find an exit. "I'm sorry; I am trying to find my way out too." I felt really bad

about not helping them. To my surprise, the two guys with blue eyes didn't look disappointed at all. They

laughed and told me, "Oh, we are wondering if there's really an exit because we have been walking

around here for 10 minutes and we still don't know where to transfer to the uptown train!"  

     NYC trains are just like doors rotating (旋转) on and on. If I hadn't got lost several times, I might not

have had the chance to stop and see what was happening outside my block.

1. According to the article, what kind of people has the author seen in the subway?

a.babysitters and housekeepers in uniforms

b.people wearing "Armani" and "Prada"

c.gentlemen with newspapers and maps

d.foreign women carrying a shopping bag with lunch and their makeup

e.foreigners checking out the map before going to new place by train

A. abc  

B. bcd  

C. cde  

D. abe

2. What can we infer from the third paragraph?

A. People of lighter skin color are less likely to live in the uptown NYC.

B. People in the suburban areas never wear "Armani" and "Prada".

C. People of different backgrounds travel by subway in NYC.

D. People of a better financial status usually don't take the subway.

3. Which of the following statement is TRUE about the author according to the article?

A. She found observing people in NYC trains quite frustrating.

B. She came to be grateful for the time when she lost her way in the subway.

C. She realized that only foreigners like her got trapped in the subway.

D. She was embarrassed when she had to ask the way in the subway.

4. What is the best title of the article?

A. An experience of taking the subway in NYC

B. The subway service in NYC

C. Busy life in uptown NYC

D. An Underground "NYC"  

题型:填空题

药师经处方审核后,认为存在用药不适宜时()。

A.应当告知处方医师,请其确认或者重新开具处方

B.不得调剂

C.应当拒绝调剂,及时告知处方医师,并应当记录,按照有关规定报告

D.药师应当按照有关规定报告

题型:填空题

为了防止儿童青少年发生意外伤害,我们要采取一定的干预措施。某同学骑自行车戴头盔,属于下面哪种干预()

A.被动干预

B.主动干预

C.教育干预

D.技术干预

E.紧急处置

更多题库