交流电是电流大小和方向都随时间作周期性变化的电流。

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问题:

交流电是电流大小和方向都随时间作周期性变化的电流。

考点:起重机操作证考试起重机司机考试起重机司机考试题库
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据林业专家分析,树叶在光合作用后产生的分泌物能够吸附空气中的一些悬浮颗粒物,具有滞尘净化空气的作用.已知一片银杏树叶一年的平均滞尘量比一片国槐树叶一年的平均滞尘量的2倍少4毫克,如果11片银杏树叶一年的平均滞尘量与20片国槐树叶一年的平均滞尘量相同,那么一片国槐树叶一年的平均滞尘量是多少毫克?

题型:判断题

药典规定制川乌中乌头碱的含量不得少于()

A.0.10%

B.0.20%

C.0.30%

D.1.10%

E.1.20%

题型:判断题

期初数据包括:期初暂估入库、期初在途存货、期初受托代销商品。

题型:判断题

Tragedies have a way of making people rethink their (1) and find a new focus. They make people think about what a society needs in order to (2) . The notion of doing something to take control of society or of our fate as humans might be dated back to ancient times of the (3) . Now, in the early 21st century, " social (4) " are trying to take back some (5) over society’s direction once again. A social inventor is not necessarily a social (6) , a social (7) or someone who works in a (8) industry or invents new (9) and consumer products. A social inventor is using the power of (10) thinking, to come up with ideas for (11) in certain communities or sections of society. They have a vision of a (12) world and create new systems or practices. Their ideas may seem (13) or impossible. They are usually quite (14) people. But some of these creative thinkers have (15) and quietly changed the way we live. Social inventions do not have to be (16) . Sometimes they are new (17) for neighborhoods or communities, or even very (18) ideas. The idea of social inventions has become so popular in recent years. It shows how much people desire to make a (19) in our society and not remain (20) .

Tragedies have a way of making people rethink their (1) and find a new focus. They make people think about what a society needs in order to (2) . The notion of doing something to take control of society or of our fate as humans might be dated back to ancient times of the (3) . Now, in the early 21st century, " social (4) " are trying to take back some (5) over society’s direction once again. A social inventor is not necessarily a social (6) , a social (7) or someone who works in a (8) industry or invents new (9) and consumer products. A social inventor is using the power of (10) thinking, to come up with ideas for (11) in certain communities or sections of society. They have a vision of a (12) world and create new systems or practices. Their ideas may seem (13) or impossible. They are usually quite (14) people. But some of these creative thinkers have (15) and quietly changed the way we live. Social inventions do not have to be (16) . Sometimes they are new (17) for neighborhoods or communities, or even very (18) ideas. The idea of social inventions has become so popular in recent years. It shows how much people desire to make a (19) in our society and not remain (20) .

题型:判断题

“小猪短租”通过搭建一个房东与房客直接沟通和变易的在线平台,鼓励有闲置房屋的人把自己的闲置房源分享出来,为旅游、求学等人群提供更具性价比、更有人情味的住宿选择。该经济形态的积极作用在于()

①满足人们多样化需求

②更新人们的消费观念

③提高居民的消费水平

④促进资源的优化配置

A、②④

B、①③

C、①④

D、②③

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