为了保证增值税专用发票的安全使用，纳税人要在（）办理缴销手续。

Passage TwoQuestions 30 to 32 are based on the passage you have just heard.30.

A. Types of Loneliness.

B. Causes of Loneliness.

C. Solutions to Loneliness.

D. Loneliness.

Passage TwoQuestions 30 to 32 are based on the passage you have just heard.

第31题：

A) Once. B) Twice.

C) Three times. D) Four times.

Passage TwoQuestions 30 to 32 are based on the passage you bave just heard.30.

A. Because their English is not good enough. B ) Because they are afraid they might meet with unfair judgment in these areas. C ) Because there is a wide difference between Asian and Westem cultures.

D. Because they Imow little about American cultures and Westem cultures.

Passage TwoQuestions 29 to 31 are based on the passage you have just heard.

第29题：

Passage TwoQuestions 29 to 31 are based on the passage you have just heard.29.

A. They can memorize long poems easily.

B. They can remember long stories.

C. They can remember almost everything they have read.

D. They can remember things they have read only once.

26-28Questions 26 to 28 are based on the passage you have just heard.

第26题：

Passage Two

Questions are based on the passage you have just heard．

根据录音，选择合适的答案（） 查看材料

A.They have the same kind of culture．

B.They are wild in different ways．

C.They have most traveled areas．

D.They have cutting edge technology．

Section BPassage One

Questions 26 to 28 are based on the passage you have just heard.

第26题：

A)Because many people believe in old ways of predicting weather.

B)Because city dwellers have no other ways of predicting weather.

C)Because it is based on long experience and observation.

D)Because we have no other origins of foretelling weather.

Passage Two Questions 30 to 32 are based on the passage you have just heard.

第30题：

A)Because it is a means communication between people of different countries.

B)Because it is a means of communication between people of different professions.

C)Because it is the second language of all the people in the world.

D)Because it is compulsory subject on every school curriculum around the world.

Passage Two

Questions 26 to 30 are based on the following passage.

The electromagnet was invented in England by William Sturgeon，who took an iron rod and bent it into the shape of a horseshoe. This “horseshoe” was coated with varnish and a layer of copper wire was wrapped around it. An electric current was passed through the wire，thus making the rod magnetic. The rod was now，because of magnetic attraction，able to support nine pounds of iron. In the US，a scientist named Joseph Henry improved on Sturgeon's electromagnet by insulating the copper wine with silk. He was able to wrap many turns of wire around an iron core without danger of short circuits between the turns. His magnet could hold 2,300 pounds. This experiment prompted Henry to try his hand at converting magnetism into electricity. First he coiled some insulated wire around an iron bar. connecting both ends of the wire to a galvanometer(电流表). The iron bar was placed across the poles of the electromagnet. Then the coil of the electromagnet was connected to a battery. The galvanometer indicated a voltage，then dropped to zero. Henry signaled his assistant to disconnect the coil. The galvanometer showed that once again a voltage had been produced，although this time in the opposite direction. The principle of electromagnetic induction had thus been discovered. Unfortunately for Joseph Henry he did not publish his findings and someone else(Faraday)got the credit for the discovery.

The principle of electromagnetic was discovered by______.

A. William Sturgeon

B. Joseph Henry

C. Faraday

D. someone else