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放射性物质在体外进行的照射称为外照射，放射性物质在体内进行的照射称为内照射。()

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听力原文：You will hear a man calling about expenditure.
A: Hello.
B: Hello, the Chief Accountant Office.
A: This is David. I am calling about expenditure. How much did we spend on entertainment this year？
B: 2 566.
A: That’s down a little on last year, And what’s the figure for depreciation？
B: 3 00, the same as last year.
A: Hm, expenditure on secretarial expenses is up．
B: Yes, there’s a big increase there．
A: What’s the figure of 2 612 for？
B: Where’s that？
A: Six figures down.
B :That's motor expenses.
A: And what does this figure represent？
B: Audit and accountancy costs.
A: They were both up a lot.
B: Yes, but expenditure on telephone and postage is down. It’s half as much as last year.
You will hear a man calling about expenditure.
Message
Total amount on entertainment this year: (9)
Items where expenditures are the same: (10)
Items where expenditures are up: secretarial expenses, motor expenses, audit and (11) costs
Items where expenditures are down: expenditures on (12) and postage

人类只要生活在地球上就无时无处不接受辐射。()

解释付款行可以受到法律保护的情形。 (1993年10月)

在工期紧的条件下，如何保证工程的质量、进度和安全？