文档介绍：第 2 页
Uint8
II. Basic Listening Practice
Script
M: Scentists claim the world population has % of the same DNA.
W: But this doesn’t tell us there is no such thing as race.
Q: What is true of the DNA of difference races?
Script
W: With the advent of the genetic map we know where everything is, but do we know where to go with it?
M: Your map seems to differ largely from my geographical map!
Q: What does the man imply?
Script
M: As you know, it has taken millions of years of evolution and natural selection to get us where we are today.
W: Yes, but now that we have genetic engineering, we seem to have decided that we want to be God.
Q: What does the woman imply?
Script
M: I think the research into cloning will lead us into dangers, filling us with false hopes of perfection.
W: It’s too late to turn back the clock. We’ll just have to depend on common sense to solve uncommon problems.
Q: What does the woman mean?
Script
W: In America, many prisoners are having their cases reviewed, and some have even been freed through DNA testing.
M: Except for the ones whose death sentence has already been carried out.
Q: What can we learn about DNA testing from the dialog?
Keys:
III. Listening In
Task 1: Stem Cell Research
Script
Gregory: The Republican party in America is opposing stem cell research. I find it
hard to believe that in this day and age, someone would do that.
Lillian: Stem cell research sounds pretty impressive, I’ll admit. But just what is it?
Gregory: Well, a stem cell is a special type of cell. It is a general cell that, when it
devides, can become any specific type of cell.
Lillian: You mean, a stem cell can become a heart cell? Or a brain or a kidney cell?
Gregory: That’s about it. Stem cells are a part of the body’s maintenance and repair
system. When they divide, they can become any cell type.
Lillian