[单项选择]

W: Dr Thomas This is Keet Bradley from Daily News. I’d like to ask you some questions about the new official standard weight that you purchased.
M: I’d be happy to help you. What would you like to know
W: First of all, how was the standard weight used
M: Well, the people in our department use it to check the scales all over the country. The department of weights and measures, we are a government agency. It’s our responsibility to see that all the scales measure a kilogram accurately so this is the way we use to adjust the scales.
W: How did you check the scales before
M: We have an old standard weight that we used to use. It had to be replaced because it was imprecise. You see it was made of poor quality metal that was too porous. It absorbed too much moisture.
W: Oh. So when the weather was humid it weighed more and when it was dry it weighed less.
M: Exactly. And that variation can affect the standards of
A. Someone spilled water on it.
B. Someone lost it.
C. It was made of low-quality metal.
D. The standard for measuring had changed.

[单项选择]

W: Dr Thomas This is Keet Bradley from Daily News. I’d like to ask you some questions about the new official standard weight that you purchased.
M: I’d be happy to help you. What would you like to know
W: First of all, how was the standard weight used
M: Well, the people in our department use it to check the scales all over the country. The department of weights and measures, we are a government agency. It’s our responsibility to see that all the scales measure a kilogram accurately so this is the way we use to adjust the scales.
W: How did you check the scales before
M: We have an old standard weight that we used to use. It had to be replaced because it was imprecise. You see it was made of poor quality metal that was too porous. It absorbed too much moisture.
W: Oh. So when the weather was humid it weighed more and when it was dry it weighed less.
M: Exactly. And that variation can affect the standards of
A. How to care for precious metals.
B. A standard unit for measuring weight.
C. The value of precious metals.
D. Using the metric system.

[单项选择]

K: Dr. Smith This is Keet Bradley from the Daily News. I’d like to ask you some questions about the new official standard weight that you purchased.
S: I’d be happy to help you. What would you like to know
K: First of all, how is the standard weight used
S: Well, the people in our department use it to check the scales all over the country. As the department of weights and measures, we are a government agency. It’s our responsibility to see that all the scales measure a kilogram accurately so this is the way we use to adjust the scales.
K: How did you check the scales before
S: We have an old standard weight that we used to use. It had to be replaced because it was imprecise. You see it was made of poor quality metal that was too porous. It absorbed too much moisture.
K: Oh. So when the weather was humid it weighed more and when it was dry it weighed less.
S: Exactly. And that variation can affect the standa
A. How to care for precious metals.
B. A standard unit for measuring weight.
C. The value of precious metals.
D. Using the metric system.

[填空题]What did Dr. Handy receive from Dr. Ryan with the letter
A Presenter’s （）.

[填空题]1 This is a conversation between Thomas Bradley and Ted Nugent after a (5)
2 Thomas Bradley work for American (6) in the (7) Department
3 Ted Nugent is a (8) in the car business.

[单项选择] From Dr. R. S. Scorer of Britain’’s Imperial College of Science comes the latest theory about the cause of lightning flashes. Dr. Scorer believes the cause is hail falling through supercooled clouds. Ice particles bouncing off the falling hail acquired a positive charge and rise to the top of the cloud while the hail carries a negative charge to the bottom of the cloud. According to Dr. Scorer, Benjamin Franklin first proved thunderclouds are charged with electricity. Later investigation showed that the tops of the clouds have a great positive charge and the bottoms a great negative charge. When the charges become great enough to break down the insulating properties of the air, lightning flashes carry the electricity within the cloud, or from cloud to cloud, or from cloud to earth. But the question remained: how do the charges develop within the cloud To seek the cause, Dr. Scorer and his colleagues at the college first duplicated thundercloud currents in a liquid t
A. lightning is caused by hail through supercooled clouds
B. thunderclouds are not charged with electricity
C. thunderclouds are charged with electricity
D. lightning was not an invention of the devil