“海上联合--2012”中俄海上联合演习于2012年4月22日起在山东青岛举行.

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“海上联合--2012”中俄海上联合演习于2012年4月22日起在山东青岛举行.据悉,此次中俄海上联合演习中俄双方会大约4000名官兵参加,将4000用科学记数法表示为______.

考点:科学记数法和有效数字
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The doctor-patient relationship is one of the (1) relationships in life, but many people say this relationship is beyond (2) . Can this relationship be saved The answer is (3) yes, because it must. And if that is lost, medicine becomes a technology and is (4) . In part the crisis in medicine began with doctors (5) themselves from patients.
The more critical work of a doctor happens in the taking of the human (6) . (7) is the most important and most difficult single transaction. The studies show that (8) of all the valuable information that leads to correct diagnosis comes from the history. Another (9) comes from the physical examination, 10% comes from simple (10) tests, and 5% comes from all the complex (11) . So listening is vital, because listening is not merely listening, but to establish a (12) .
But some doctors think listening is (13) . They like to use complex and costly (14) , and use (15) that create adverse reactions and require (16) . They don’t like to listen. Because there’s no premium on listening and that there’s no (17) for listening.
Even so, the doctor-patient relationship is not (18) saving. Because people may ask, what is good health And good health begins first and foremost with (19) . If you don’t care for a (20) , be somebody else, but don’t be a doctor!

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E-R模型是描述概念世界、建立______的实用工具。

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在自然界环境中,各种因素都影响着生物,生物在生存发展的过程中要不断      环境,同时,它也会                   着环境。

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雨水管渠的设计降雨历时t,由地面降水时间t1和雨水在计算管段中流行的时间t2组成。其计算公式:t=t1+mt2其中m为延迟系数,计算时在暗管管渠中的取值是()。

A.1

B.1.5

C.2

D.3

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自动化仪表调校室内清洁、光线充足、通风良好;室内温度维持在( )之间。

A.0°~25°

B.5°~30°

C.10°~35°

D.15°~35°

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