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问题 选择题

关于“可持续发展”含义的理解，正确的是[ ]

A．可以维持经济不间断地发展

B．既能满足当代人的需要，又不对后代人满足其自身需求的能力构成危害的发展

C．可继续进行社会再生产

D．人类活动不影响环境，以免将来环境危害人类发展

答案

答案：B

单项选择题

The program memory serves basically as a place (1) instructions, the coded pieces of data (2) direct the activities of the control processing unit (CPU). A group of (3) related in- structions stored in memory is referred to as a program. The CPU "read" each instruction from memory a logically (4) sequence and "use" it to initiate program action. If the program structure is coherent and (5) , processing procedures produce intelligible and useful results.

3（）

A．logic

B．logical

C．logically

D．logicality
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单项选择题

下列哪项不是感染链的基本环节？（）

A.感染源

B.感染途径

C.感染时间

D.易感人群
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