单项选择题

What is the profession of the speaker

A．A teller.
B．An economist.
C．A travel agent.
D．A customs official.
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单项选择题
Which of the following does NOT help to separate the useful U-235 and nearly useless U~2387
A．The principle of gaseous diffusion.
B．A process involving magnetic separation of the two isotopes.
C．A process nearly identical in the chemical makeup.
D．A gas centrifug
问答题
Listen to the following passage. Altogether the passage will be read to you four times, During the first reading, which will be read at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be read at normal speed again and during this time you should check your work. You will then be given 2 minutes to check through your work once more. Please write the whole passage on ANSWER SHEET TWO.
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