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[主观题]

Section BDirections: In this section, you will hear 3 short passages. At the end of each p

Section B

Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.

听力原文: At one time it was the most important city in the region--a bustling commercial center known for its massive monuments, its crowded streets and commercial districts, and its cultural and religious institutions. Then, suddenly, it was abandoned. Within a generation most of its population departed and the at once magnificent city became all but a ghost town. This is the history of a pre-Columbia city called Teotihuacan. The name is the Aztec word, which means "the place the god calls home". It was once a metropolis of as many as 2,000,000 inhabitants 33 miles northwest of present-day Mexico City. And it was also the focus of a great empire that stretched from the arid plains of central Mexico to the mountain of Guatemala.

Why did this city die? Researchers have found no signs of epidemic disease or destructive invasions. But they have found signs that suggest the Teotihuacanos themselves burned their temples and some of their other buildings. There were evidence revealed that piles of wood had been placed around these structures and set fire. Some speculate that Teotihuacan's inhabitants may have abandoned the city because it had become "a clumsy giant..." But other experts think that the ancient inhabitants may have destroyed their temples and abandoned their city in rage against their gods for permitting a long famine.

(27)

A.It's near the Mexico City.

B.It's in Guatemala.

C.It's stretched from the plains of central Mexico to the mountains of Guatemala.

D.It's in America.

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第1题

采用Ficoll密度梯度分离液处理血液后,分离结果从上至下依次为A.稀释的血浆、粒细胞、单个核细胞、红

采用Ficoll密度梯度分离液处理血液后,分离结果从上至下依次为

A.稀释的血浆、粒细胞、单个核细胞、红细胞

B.稀释的血浆、红细胞、单个核细胞、粒细胞

C.单个核细胞、稀释的血浆、粒细胞、红细胞

D.稀释的血浆、单个核细胞、粒细胞、红细胞

E.稀释的血浆、单个核细胞、红细胞

点击查看答案

第2题

采用Ficoll密度梯度分离液处理血液后,分离结果从上至下依次为A.稀释的血浆、粒细胞、单个核细胞、红

采用Ficoll密度梯度分离液处理血液后,分离结果从上至下依次为

A.稀释的血浆、粒细胞、单个核细胞、红细胞

B.稀释的血浆、红细胞、单个核细胞、粒细胞

C.单个核细胞、稀释的血浆、粒细胞、红细胞

D.稀释的血浆、单个核细胞、粒细胞、红细胞

E.稀释的血浆、单个核细胞、红细胞

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第3题

用Ficoll分层液分离外周血中单个核细胞,其分布由上到下依次为 A.血浆、粒细胞、单个核细胞、红

用Ficoll分层液分离外周血中单个核细胞,其分布由上到下依次为

A.血浆、粒细胞、单个核细胞、红细胞

B.血浆、单个核细胞、红细胞、粒细胞

C.血浆、单个核细胞、粒细胞、红细胞

D.红细胞、粒细胞、单个核细胞、血浆

E.粒细胞、单个核细胞、红细胞、血浆

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第4题

用Ficoll分层液分离外周血中的单个核细胞其分布由上而下依次为A、血浆、粒细胞、单个核细胞、红细胞B

用Ficoll分层液分离外周血中的单个核细胞其分布由上而下依次为

A、血浆、粒细胞、单个核细胞、红细胞

B、血浆、单个核细胞、红细胞、粒细胞

C、血浆、单个核细胞、粒细胞、红细胞

D、红细胞、粒细胞、单个核细胞、血浆

E、粒细胞、单个核细胞、红细胞、血浆

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第5题

Ficoll密度梯度分层液主要用于分离外周血中的哪种成分A、粒细胞B、单个核细胞C、红细胞D、巨噬细胞E、

Ficoll密度梯度分层液主要用于分离外周血中的哪种成分

A、粒细胞

B、单个核细胞

C、红细胞

D、巨噬细胞

E、血小板

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第6题

Ficoll密度梯度分层液主要用于分离外周血中的A.粒细胞B.单个核细胞C.红细胞D.巨噬细胞E.血小板

Ficoll密度梯度分层液主要用于分离外周血中的

A.粒细胞

B.单个核细胞

C.红细胞

D.巨噬细胞

E.血小板

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第7题

Ficoll密度梯度分层液主要用于分离外周血中的A.粒细胞B.单个核细胞C.红细胞D.巨噬细胞E.血小板

Ficoll密度梯度分层液主要用于分离外周血中的

A.粒细胞

B.单个核细胞

C.红细胞

D.巨噬细胞

E.血小板

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第8题

用Ficon分层液分离外周血中单个核细胞,其分布由上到下依次为()A.血浆、粒细胞、单个核细胞、红细

用Ficon分层液分离外周血中单个核细胞,其分布由上到下依次为()

A.血浆、粒细胞、单个核细胞、红细胞

B.血浆、单个核细胞、红细胞、粒细胞

C.血浆、单个核细胞、粒细胞、红细胞

D.红细胞、粒细胞、单个核细胞、血浆

E.粒细胞、单个核细胞、红细胞、血浆

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第9题

Ficoll分层液法离心后外周血细胞分布由上至下依次为 ()A、单个核细胞、血小板和血浆、粒细胞、

Ficoll分层液法离心后外周血细胞分布由上至下依次为 ()

A、单个核细胞、血小板和血浆、粒细胞、红细胞

B、血小板和血浆、粒细胞、单个核细胞、红细胞

C、血小板和血浆、红细胞、单个核细胞、粒细胞

D、血小板和血浆、单个核细胞、红细胞、粒细胞

E、血小板和血浆、单个核细胞、分层液、粒细胞、红细胞

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第10题

用Ficoll分层液分离外周血细胞,由上到下依次是A、稀释的血浆层、粒细胞层、红细胞层和单个核细胞层B

用Ficoll分层液分离外周血细胞,由上到下依次是

A、稀释的血浆层、粒细胞层、红细胞层和单个核细胞层

B、稀释的血浆层、单个核细胞层、粒细胞层和红细胞层

C、稀释的血浆层、红细胞层、单个核细胞层和粒细胞层

D、稀释的血浆层、红细胞层、粒细胞层和单个核细胞层

E、红细胞层、单个核细胞层、粒细胞层

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