问题 填空题

DDT包括()、()、()和()4种异构体。

答案

参考答案:P,P,-DEE;O,P’-DDT;P,P’DDD;P,P’DDT

解答题
阅读理解

Answer the following questions by using the information taken from a dictionary page.(You may read the questions first.)

jaguar: n.a type of large, yellow-colored cat with black markings found in the southwestern region of the U.S.and in Central and South America.

jargon: 1.n.an unknown language that seems strange or impossible to understand.2.n.a language made up of two or more other languages: His jargon was a mixture of French and English- 3.n. the special vocabulary of a field or profession: Her report on computers was filled with jargon.4.n.speech that doesn't make sense.

jaunt: 1.n.a trip taken for fun.2.v.to go on a brief pleasant trip: We jaunted to the country last

Saturday.javelin: 1.n.a spear most commonly used as weapon or in hunting.2.n.the contest in which a javelin is thrown.3.n.a lightweight metal or wooden spear that is thrown in track-and-field contests.4, v.to strike, as with ajavelin.

jazz: 1.n.a type of music that originated in New Orleans and is characterized by rhythmic eats.2.n.popular dance music influenced by jazz..3.n.slang empty talk.4.ad.of or like jazz: a jazz band, jazz records.

Jennet; n.a small Spanish horse.

小题1:Which meaning of the word javelin is used in the sentence below?

At the competition, Jack drew his arm back and threw the javelin 50 yards.

A.Definition 1

B.Definition 2

C.Definition 3

D.Definition 4小题2:Which meaning of the word jargon is used in the sentence below?

Doctors often speak in medical jargon.

A.Definition 1

B.Definition 2

C.Definition 3

D.Definition 4小题3:What does the word jazz mean in the following sentence?

Don t give me that jazz, for lam a practical person.

A.nonsense

B.a kind of dance

C.a type of music

D.rhythmic beats