如图是某同学探究电流与电压关系的电路图.开关S闭合后.将滑动变阻器的滑片P从a端

题型:填空题

问题:

如图是某同学探究电流与电压关系的电路图.开关S闭合后.将滑动变阻器的滑片P从a端移至b端,电流表和电压表的示数变化关系如图右所示.由图象可得:通过R0的电流与R0两端的电压成 _________ ,定值电阻R0的阻值是 _________ Ω.(实验时电源电压3V保持不变)

考点:欧姆定律及其应用
题型:填空题

邮包运输保险的保险责任自被保险邮包离开保险单所载起运地点寄件人的处所开始生效至保险单所载明的目的地起算满()为止。

A.10天

B.15天

C.30天

D.20天

题型:填空题

具有氧化酶活性的是()。

A.免疫球蛋白

B.肌红蛋白

C.O脂蛋白

D.铜兰蛋白

E.清(白)蛋白

题型:填空题

某混合溶液中含有NaNO3、Ba(NO32和Cu(NO32,通过下列实验操作将Ba(NO32和Cu(NO32分别除去,得到NaNO3溶液(呈中性).请将实验步骤、现象和有关的化学方程式填入表中.

实验步骤实验现象化学方程式
(1)在混合溶液中加入过量的______溶液,过滤.____________
(2)在滤液中加入过量的______溶液,过滤.____________
(3)在滤液中逐渐加入______,同时用pH试纸测定溶液的pH,使溶液的pH最终为7.____________

题型:填空题

With large and small keyboards everywhere, neither children nor adults need to write much of anything by hand. That’s a big problem. Study after study suggests that handwriting is important for brain development — helping kids get fine motor skills and learn to express and create ideas. Yet the time devoted to teaching penmanship in most schools has shrunk to just one hour a week. Is it time to give up handwriting? Have a look at the link between the brain and penmanship, and you may get the answer.

A test among students in grades 2, 4 and 6 found that they not only wrote faster by hand than by keyboard, but also created more ideas when composing essays with handwriting. And other research shows that the finger movements required to write by hand activate brain areas involved with thought, language, and short-term memory.

A recent Indiana University study had one group of children practice writing letters by hand while a second group just looked at those letters. Then, both groups of kids entered a functional MRI (核磁共振)that scanned their brains as the researchers showed them the same letters. Researchers found that the brain activity in the first group was far more advanced and “adult-like”.

Handwriting also affects other people’s way they think of adults and children. Several studies have shown that the same average essay will score much higher if written with good penmanship and much lower if written out in poor handwriting. These studies have also found that people judge the quality of a person’s ideas based on his or her handwriting. And the consequences are real: On standardized tests with handwritten sections, like the SAT, all essay that is considered hard to recognize gets a big zero.

Studies show that this isn’t only an English-language phenomenon. Chinese and Japanese youths are suffering from “character amnesia”. They can’t remember how to write characters, thanks to computers and text messaging. Some experts fear that Chinese writing and reading are so closely linked in the brain that China’s reading ability as a nation could suffer.

小题1:.

What does the Indiana University study imply?

A.Children should practice writing letters

B.Handwriting can increase brain activity

C.It’s good for children to enter a functional MRI.

D.Letters should often be shown to children小题2:.

What does the 4th paragraph mainly talk about?

A.Handwriting affects both adults and children.

B.Handwriting helps a person write better essays.

C.SAT should be done with good handwriting.

D.Good handwriting makes a person seem smarter.小题3:.

Which of the following statements is TRUE?

A.Essays written with keyboards will get lower scores.

B.The quality of your ideas depends on your handwriting.

C.Chinese and Japanese youths don’t know how to write.

D.Less handwriting may affect China’s reading ability.小题4:.

The passage tries to tell us that __________________.

A.keyboards are more popular than handwriting

B.we shouldn’t judge people by their handwriting

C.handwriting is of great importance

D.it’s time to give up using keyboards

题型:填空题

施工总承包合同协议书中的合同价款应填写()。

A.双方确定的合同金额

B.招标人编制的标底价

C.整个工程的预算价

D.评标委员会的参考价

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