阅读理解。
Mount Qomolangma is the highest mountain in the world. It is in the Himalayan (喜玛拉雅) Mountains
between Nepal (尼泊尔) and China, and it is 8900 meters high. Sir Edmund Hillary from New Zealand and
Tenzing Norgay from Nepal were the first people ever to climb Mount Everest in 1953. Men from several
different countries climbed it after that.
Junko Tabei, a Japanese was the first woman to make this difficult climb. A Japanese newspaper-television
company chose the fifteen women from mountaineering clubs to climb Mourn Qomolangma in 1975. The
group climbed for several days. Then there was an accident. The heavy ice and snow hurt ten of the women.
They had to stop climbing. The other five went on climbing.
Only Ms. Tabei was able to climb the last 70 meters. She was standing on the top of the world. She was
the first woman there. Ms Tabei was 35 years old at the time. She started climbing mountains in 1960. She
still climbs mountains. She is not an ordinary Japanese housewife. Ms. Tabei makes money for her trips by
teaching English and piano to children. She climbs a mountain about every three years. She has climbed some
of the highest mountains in six countries. Finally, she wants to climb the highest mountain in every country in
the world. When she reaches the top of a mountain, she thinks, "I'm glad that I'm at the top."
1. Mount Qomolangma is ______. [ ]
A. an ordinary mountain
B. the highest mountain in the world
C. in the southwest of China
D. close to Nepal
2. The climber from New Zealand first climbed Mount Qomolangma in ______. [ ]
A. 1975
B. 1960
C. 1935
D. 1953
3. What happened to ten of the women climbers on the way to the top of Mount Qomolangma? [ ]
A. They were too tired to climb to it.
B. There was no air for them.
C. The heavy snow stopped them.
D. They were hurt by heavy ice and snow.
4. How many women climbed up to Mount Qomolangma in 1975? [ ]
A. One.
B. Five.
C. Ten.
D. Fifteen.
5. What kind of person is Ms, Tabei? [ ]
A. She's a housewife who has climbed many high mountains in the world.
B. She teaches children English and piano to make money.
C. She's a usual housewife who helps a lot at home.
D. She climbed the highest mountain in the world many times.
，由并联电路的特点可知：
可得通过电阻R2的电流
，所以通过电阻R1的电流
，所以选项A错误；由
可知
，故选项B错误；由
可知：P1︰P2︰P3=(9I2×4Ω)︰(4I2×9Ω)︰(I2×18Ω)= 2︰2︰1，故选项D正确．