《中华人民共和国产品质量法》规定，（）是产品质量的责任主体。A．设计者  B．加工者

从唯物主义历史观的角度看，识时务者为俊杰，这里的“时务”喻指[ ]

A．经济基础决定于上层建筑规律

B．生产力要适应生产关系状况规律

C．支配人类社会发展的基本规律

D．人类社会普遍存在的阶级斗争规律

下面一组数据为9个家庭的人均月收入数据(单位：元)：700、780、850、960、1080、1300、1500、1650、1800，中位数为()。

A.700

B.960

C.1080

D.1800

率是说明_________或强度的指标。

阅读理解。

     Have you ever had the strange feeling that you were being watched? You turned around and,sure

enough, someone was looking right at you!

      Parapsychologists (灵学家) say that humans have a natural ability to sense when someone is looking

at them. To research whether such a "sixth sense" really exists, Robert Baker, a psychologist (心理学家)

at the University of Kentucky, performed two experiments.

      In the first one, Baker sat behind unknowing people in public places and stared at the backs of their

heads for 5 to 15 minutes. The subjects (受试者) were eating, drinking, reading studying, watching TV,

or working at a computer. Baker made sure that the people could not tell that he was sitting behind them

during those periods. Later, when he questioned the subjects, almost all of them said they had no sense

that someone was staring at them.  

     For the second experiment, Baker told the subjects that they would be stared at from time to time from

behind a two way mirror in a laboratory setting. The people had to write down when they felt they were

being stared at and when they weren't. Baker found that the subjects were no better at telling when they

were stared at and when they weren't.Baker found that the subjects were no better at telling when they

were started at than if they had just guessed.

     Baker concludes that people do not have the ability to sense when they're being stared at.If people doubt

the outcome of his two experiments, said Baker, "I suggest they repeat the experiments and see for

themselves."

1. The purpose of the two experiments is to ____.

A. explain when people can have a sixth sense

B. show how people act while being watched in the lab

C. study whether humans can sense when they are stared at

D. prove why humans have a sixth sense

2. In the first experiment, the subjects _____.

A. were not told that they would be stared at

B. lost their sense when they were stared at

C. were not sure when they would be stared at

D. were uncomfortable when they were stared at

3. The underlined word "outcome" in the last paragraph most probably means _____.

A. value

B. result

C. performance

D. connection

4. What can be learned from the passage?

A. People are born with a sixth sense.

B. The experiments support parapsychologists'idea.

C. The subjects do not have a sixth sense in the experiments.

D. People have a sixth sense in public places.

函数pi的功能是根据以下近似公式求π值： (π*π)/6=1+1/(2*2)+1/(3*3)+...+1(n*n) 现在请你在下面的函数中填空，完成求π的功能。 #include "math.h" { double s=0.0; long i;for(i=1;i＜=n;i++)s=s+ 【10】 ;return (sqrt(6*s)); }