30. According to the passage, why is Leonardo da Vinci’s research into the human anatomy so
helpful to doctors?
(A) The knowledge provided by his research helped doctors in Europe discover the principles
of physics.
(B) Medical schools in Europe did not provide doctors with any information about illnesses and
injuries.
(C) Before his research, doctors in Europe were not trained to draw the structure of the human
body.
(D) His research provided knowledge which allowed doctors to have a better understanding of
the structure of the human body.

▲閱讀下文，回答第 31 – 35 題
Smog, which was once the big attraction of Los Angeles, can now be found all over the
country from Butte, Montana, to New York City, and people are getting so used to polluted air that
it’s very difficult for them to breathe anything else.
I was lecturing recently, and one of my stops was Flagstaff, Arizona, which is about seven
thousand miles above sea level.
As soon as I got out of the plane, I smelled something peculiar.
“What’s that smell?” I asked the man who met me at the plane.
“I don’t smell anything,” he replied.
“There’s definitely an odor that I’m not familiar with,” I said.
“Oh, you must be talking about the fresh air. A lot of people come out here who have never
smelled fresh air before.”
“What’s it supposed to do?” I asked suspiciously.
“Nothing. You just breathe it like any other kind of air. It’s supposed to be good for your lungs.”
“I’ve heard that story before,” I said.
“How come if it’s air, my eyes aren’t itching and watering?”
“Your eyes don’t water with fresh air. That’s the advantage of it. Saves you a lot in paper tissues.”
We drove in silence. About fifteen minutes later he asked, “How do you feel now?”
“Okay, I guess, but I miss sneezing.”
“We don’t sneeze too much here,” the man admitted. “Do they sneeze a lot where you come from?”
“All the time. There are some days when that’s all you do.”

“Do you enjoy it?”
“Not necessarily, but if you don’t sneeze, you’ll die.”
The fresh air was making me feel dizzy. “Isn’t there a diesel bus around here that I could
breathe into for a couple of hours?”
“Not at this time of day. I might be able to find a truck for you.”
We found a truck driver, and slipped him a five-dollar bill, and he let me put my head near his
exhaust pipe for a half hour. I was immediately revived and able to give my speech.
Nobody was as happy to leave Flagstaff as I was. My next stop was Los Angeles, and when I
got off the plane, I took one big deep breath of the smog-filled air, my eyes started to water, I
began to sneeze, and I felt like a new man again.

答案：登入後查看
統計： 尚無統計資料