若一个数的相反数为﹣2.5,则这个数是( ),它的倒数是( ).

题型:填空题

问题:

若一个数的相反数为﹣2.5,则这个数是(    ),它的倒数是(    ).

考点:相反数倒数
题型:填空题
安装家庭电路时,下面的几种做法不正确的是(  )

A.将各盏灯并联

B.将插座和电灯并联

C.将电灯的一端通过控制电灯的开关接到火线上,电灯的另一端接到零线上

D.螺丝口灯泡的金属螺旋接火线,尾部中心的金属块接零线

题型:填空题

近年来,绿色消费悄然升温,清洁安全、无公害成为消费者的首选标准。在市场需求的拉动下,绿色产业迅速发展。这说明

A.生产决定消费的对象

B.消费对生产的调节起着导向作用

C.生产决定消费的内容

D.消费水平与经济发展水平密切相关

题型:填空题

把4克糖放入6克水中,糖和糖水的比是2:5.______.

题型:填空题
在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内切的圆,如图所示.那么碳14的衰变方程为(  )

A.+

B.+

C.+

D.+

题型:填空题

What’s your earliest childhood memory Can you remember learning to walk Or talk The first time you heard thunder or watched a television program Adults seldom (1) events much earlier than the year or so before entering school, (2) children younger than three or four (3) retain any specific, personal experiences.

A variety of explanations have been (4) by psychologists for this "childhood amnesia". One argues that the hippo-campus; the region of the brain which is (5) for forming memories, does not mature until about the age of two. But the most popular theory (6) that, since adults don’t think like children, they cannot (7) childhood memories. Adults think in words, and their life memories are like stories or (8) one event follows (9) as in a novel or film. But when they search through their mental (10) for early childhood memories to add to this verbal life story, they don’t find any that fit the (11) . It’s like trying to find a Chinese word in an English dictionary.

Now psychologist Annette Simms of the New York State University offers a new (12) for childhood amnesia. She argues that there simply aren’t any early childhood memories to (13) . According to Dr. Simms, children need to learn to use someone else’s spoken description of their personal (14) in order to turn their own short-term, quickly forgotten (15) of them into long-term memories. In other (16) , children have to talk about their experiences and hear others talk about (17) --Mother talking about the afternoon (18) looking for seashells at the beach or Dad asking them about their day at Ocean Park. Without this (19) reinforcement, says Dr. Simms, children cannot form (20) memories of their personal experiences.

Notes: childhood amnesia 儿童失忆症。

(1)()

A.figure

B.interpret

C.recall

D.affirm

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