中国人看国产影视片容易分别辨出人物面形，而看外国片则难于分辨。这种现象的心理学解释是

8～11个月的婴儿患维生素D缺乏性佝偻病，最常见的骨骼改变是

A．颅骨软化

B．方颅

C．肋膈沟

D．肋骨串珠

E．“O”形腿

关于中心静脉压，下列说法错误的是（）。

A.CVP>16cmH₂O应暂停输液，给予利尿剂或强心剂治疗

B.正常值为5～12cmH₂O

C.代表上、下腔静脉或右心房内压力

D.测量CVP时应暂停使用呼吸机

E.可评估血容量和左心功能

小周要测量某金属块的密度，实验过程如下：

（1）他应把天平放在______桌面上，将游码移至标尺左端的零刻度线处，发现指针偏向分度盘左侧，他应将平衡螺母向______（选填“左”或“右”）移动，使天平横梁平衡．

（2）用调好的天平测金属块的质量，天平再次的情景如图（a）所示，金属块的质量为

______g；他用量筒测金属块的体积时，金属块放入量筒前后的液面高度如图（b）所示，金属块的体积为______cm³．

（3）所测金属块的密度为______g/cm³．

（）是制定标准对象的基本属性。

A.重复性事物

B.客观性事物

C.新事物

D.相似事物

Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy ;there’s no need for a lot of scientific terms or expensive lab equipment. You only have to share your children’s curiosity. Firstly,listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me" textbook questions" about schooling, salary and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, "Now that we’ve finished with your lists, do you have questions of your own about science"
After a long pause ,a boy raised his hand," Have you ever seen a grasshopper(蚱蜢) eat When I try eating leaves like that, I get a stomachache. Why"
This began a set of questions that lasted nearly two hours.
Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults typically wait only one second or less tor an answer, no time for a child to think. When adults increase their" wait time" to three seconds or more, children give more logical, complete and creative answers.
Thirdly, watch your language. Once you have a child involved in a science discussion, don’t jump in with" That’s right" or" Very good". These words work well when it comes to encouraging good behavior. But in talking about science, quick praise can signal that discussion is over. Instead, keep things going by saying" That’s interesting" or" I’d never thought of it that way- before", or coming up with more questions or ideas.
Never push a child to" Think". It doesn’t make sense, children are always thinking, without your telling them to. What’s more, this can turn a conversation into a performance. The child will try to find the answer you want, in as few words as possible, so that he will be a smaller target for your disagreement.
Lastly, show;don’t tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass, and they’ll understand why you want them to wash before dinner. Rather than saying that water evaporates, set a pot of water to boil and let them watch the water level drop.

In the last sentence of the first paragraph, the word " lists" could best be replaced by______.

A. any questions


B. any problems
C. questions from textbooks

D. any number of questions