问题 选择题

已知在pH为4~5的溶液中,Cu2+几乎不水解,而Fe3+几乎完全水解。某学生拟用电解CuSO4溶液的方法测定铜的相对原子质量。该同学向pH=3.8的含有 Fe2(SO4)3杂质的CuSO4溶液中加入适量的黑色粉末X,充分搅拌后过滤,将滤液用如图所示装置电解,其中某电极增重ag,另一电极上产生标准状况下的气体y mL。

下列说法正确的是 [ ]

A.黑色粉末X是铁粉

B.铜电极连接电源正极

C.石墨电极上发生的反应是4OH--4e-=O2↑+2H2O

D.铜的相对原子质量的计算式是

答案

答案:C

阅读理解

A new walking, talking robot from Japan which has black hair and a woman’s face that can smile will attend a fashion show. It has trimmed down(减少)to 43kg, but it still hasn’t reached the safety standards required to share the catwalk with human models.

Developers at the National Institute of Advanced Industrial Science and Technology, a government-backed organization, said their “cybernetic(全自动控制的)human” wasn’t ready to help with daily housework or work side by side with people—as many hope robots will be able to do in the future.

“In technology, it hasn’t reached that level,” said Hirohisa Hirukawa, one of the robot’s developers. “Even as a fashion model, people in the industry told us she was short and had a rather ordinary figure.”

For now, the 158 cm tall black-haired robot named HRP-4C—whose predecessor(前任)had weighed 58 kg — will mainly serve to draw and entertain crowds. Developers said the robot may be used in amusement parks or to perform human movement, as an exercise instructor, for instance.

HRP-4C was designed to look like an ordinary Japnese woman, although its silver-and-black body reminds people of a space suit. It will appear in a Tokyo fashion show — without any clothes — in a special part just for the robot next week.

The robotic framework(框架)for  HRP-4C, without the face and other coverings, will go on sale for about 20 million yen(日元) each. Its programming technology will be made public so other people can come up with fun moves for the robot, the scientists said.

Japan is one of the leading robotics industries in the world, and the government is pushing to develop the industry as a road to growth.

小题1:What do we know about HRP-4C’s predecessor?

A.It is shorter than HRP-4C .    B.It is cleverer than HRP-4C .

C.It is taller than HRP-4C .     D.It is heavier than HRP-4C .

小题2:According to the passage, how many of the following could HRP-4C do?

a. drawing pictures

b.  walking and talking

c.  doing housework

d.  working with people

e. smiling

A.2

B.3

C.4

D.5小题3:Which of the following about HRP-4C is TURE?

A.It wears a space suit.

B.Its price is 20 million dollars.

C.It can be used as an exercise instructor.

D.As a fashion model, it has a perfect figure.小题4:HRP-4C’s programming technology will be made public to        .

A.make money

B.make new frameworks

C.let other people improve it

D.help make new face and coverings小题5:What does the passage mainly talk about?

A.The purpose of making HRP-4C.    B.Robotics industry in Japan.      

C.A new Japanese robot.               D.Japanese and robots.

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