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【简答题】
带电离子的产生主要有碰撞电离、______、______、表面电离等方式。
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反馈参考答案：
举一反三
【简答题】已知电路如图所示，Z 1 =(5+j5)Ω，Z 2 =(6-)Ω， ，试求Z、 。
【单选题】According to the new law, the people found ________ “harmful” advertisements on the streets will be punished strictly.
A.
put up
B.
to put up
C.
putting up
D.
having put up
【简答题】When Mark Twain became a miner in the frontier region, he started to write.
【简答题】电路如题图所示，R 1 =6Ω，电路原已处于稳态，t=0时S闭合，并已知t＞0时： 。试求I S 、R 2 、L、C、u C (t＞0时)。
【单选题】The new law has come into effect, and ________ number of wild animals here is on ________increase now. [ ]
A.
the; the
B.
a; the
C.
the; /
D.
a; /
【简答题】Peter’s job was to examine cars when they crossed the frontier to make sure that they were not smuggling(走私) anything into the country. Every evening he would see a factory worker coming up the hill t...
【简答题】A federal law requires that, by 1975, new cars should be equipped with devices to remove ______.
【简答题】阅读图文资料，完成下列要求。 青海湖，地处青海高原的东北部，西宁市的西北部，是我国第一大内陆湖泊，也是我国最大的咸水湖。面积达4456平方公里，平均深约21米多，最大水深为32.8米。青海湖湖水来源主要依赖地表径流和湖面降水补给。青海湖藻类物质繁殖，鱼类资源十分丰富，以盛产湟鱼而闻名。年3-4月，从南方迁徙来的雁、鸭、鹤、鸥等候鸟陆续到青海湖开始营巢；5-6月间鸟蛋遍地，幼鸟成群，热闹非凡，声扬数...
【单选题】When a production possibilities frontier is linear it shows
A.
a truer picture of real life than a bowed out production possibilities frontier.
B.
that resources are perfectly shiftable from the production of one good to another.
C.
an example of increasing opportunity cost.
D.
All of the above are correct.
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