测定水中生化需氧量的方法有哪些?

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问题:

测定水中生化需氧量的方法有哪些?

考点:环境监测上岗考试环境监测上岗考试题库
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出口瓦楞包装纸箱造型结构设计的先后设计程序为:设计构想、样品制作、试装试验和图纸绘制。( )

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绝热真空刚性容器内充入理想气体后,容器内气体的温度比充气前气体的温度( )。

A.低

B.高

C.不确定

D.相同

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当事人在劳动合同或者保密协议中约定了竞业限制和经济补偿,劳动合同解除或者终止后,由于用人单位的原因导致()未支付经济补偿,劳动者可以请求解除竞业限制约定。

A.六个月

B.五个月

C.三个月

D.两个月

题型:问答题 简答题

If you often feel tired and the doctor can’t find anything wrong with you, you may be in a state of Subhealth (亚健康). Subhealth is a state between health and illness. Most of the subhealthy people are middle-aged ones who are usually stressed out because of work and family. And some of them are students who are having exams.
If you are subheahlty, it is not difficult for you to become well soon. You should have good living habits. For example, you should get up early and go to bed early. And you should exercise regularly. Exercising can keep you healthy. As for meals, it is better to eat less salt and sugar. Vegetables, fruit and fish are important to your body. You should eat more of them. It is not good to eat too much at one meal, because it may cause unhealthy changes in the digestive tract(消化道). And at last, a balanced diet is very helpful in staying away from subhealth.

How may you feel if you’re subhealthy

A. Happy
B. Comfortable
C. Tired
D. Sad

题型:问答题 简答题

English language publications in China are growing in volume and________.

A.circulation

B.rotation

C.circumstance

D.appreciation

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