问题 单项选择题 B1型题

体内分布最广的外周免疫器官是()

A.骨髓

B.脾脏

C.淋巴结

D.扁桃体

E.胸腺

答案

参考答案:C

解析:1.T细胞是在胸腺中发育成熟的淋巴细胞,故又称为胸腺依赖淋巴细胞。2.B细胞是在骨髓内发育成熟的淋巴细胞,故又称为骨髓依赖性淋巴细胞。3.人体有成百上千的淋巴结,遍布全身,只有比较表浅的部位才可触及。4.脾脏是富含血管的最大的外周免疫器官。

阅读理解

阅读理解。

    Mr. and Mrs. Harris had always spent their summer holidays in a small hotel at the seaside near their

hometown. One year, however, Mr. Harris made a lot of money in his factory, so they decided to go to

a foreign country and stay at a really good hotel.

   They flew to Paris, and arrived at a 5-star hotel late in the evening. They thought they would have to

go to bed hungry, because in that small hotel where they used to stay in the past, no meals were served

after seven in the evening. They were surprised to be told that the hotel served dinner until ten.

    "Then what are the times of meals?" asked Mrs. Harris.

    "Well, Madam, we serve breakfast from seven to eleven, lunch from twelve to three, tea from four to

five, and dinner from six to ten."

    "But that hardly leaves any time for us to see the city!" said Mrs. Harris.

1. Why did Mr. and Mrs. Harris think they would have to go to bed hungry when they arrived at the hotel? [ ]

A. Because it's a 5-star hotel.

B. Because they thought no meals would be served late in the evening.

C. Because they were very tired after the trip.

D. Because they didn't want to eat anything.

2. How long did the service time for lunch last in the hotel? [ ]

A. 2 hours.

B. 4 hours.

C. 3 hours.

D. 1 hour.

3. What did Mrs. Harris think of the times of the meals in the hotel? [ ]

A. She thought they would have enough time to see the city.

B. She thought they would have to spend too much time on meals instead of travelling.

C. She thought they would have enough time to have meals.

D. She thought the times were suitable and felt very satisfied.

选择题