图中,同在冬季,两位同学的衣着不同.造成这种现象的主要因素是( ) A.海陆位置

题型:选择题

问题:

图中,同在冬季,两位同学的衣着不同.造成这种现象的主要因素是(  )

A.海陆位置

B.地形地势

C.经度位置

D.纬度位置

考点:中国的疆域
题型:选择题
图1是某同学设计的电容式速度传感器原理图,其中上板为固定极板,下板为待测物体,在两极板间电压恒定的条件下,极板上所带电量Q将随待测物体的上下运动而变化,若Q随时间t的变化关系为Q=b/(t+a)(a、b为大于零的常数),其图象如图2所示,那么图3、图4中反映极板间场强大小E和物体速率v随t变化的图线可能是(  )

A.①和③

B.①和④

C.②和③

D.②和④

题型:选择题

Every new thought or idea has to be connected to what we already know. Unfortunately, it is easy to limit the possibilities of a new idea by connecting it to only one area of our previous knowledge. Great thinkers are aware of this and try to combine new and old ideas in as many different ways as possible. They also try to make connections that may seem strange at first. By comparing and connecting ideas and objects in new ways, creative thinkers are able to think of new applications and solutions. Many of the things that we use every day were invented by someone who saw similarities between his or her ideas and objects or systems in the world.

题型:选择题

双胎妊娠在妊娠期常见并发症为:______、______、______及______。

题型:选择题

我国要长期稳定以家庭承包经营为基础、统分结合的双层经营体制,其关键和基础是( )。

A.加快农村经济体制改革

B.提高农业的生产力水平

C.稳定和完善土地承包关系

D.完善农业社会化服务体系

题型:选择题

家禽的骨软化症是由于()。

A、钙缺乏

B、磷缺乏

C、铁缺乏

D、硒缺乏

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