德国心理学家艾宾浩斯研究发现遗忘在学习之后立即开始，而且遗忘的进程并不是均匀的。

阅读理解。

     Have you ever gone traveling on the train that was named after the letter D?

     Named after the letter D, the new trains run at speeds of 200 to 250 kilometers one hour. These are much

faster than Z-type and T-type trains. For example, it used to take people 12 hours to travel from Shanghai to

Beijing. But now it only takes 10 hours. The most interesting part of the bullet (子弹头) trains is the revolving (旋转) seats. People can adjust (调整) their seats as they like, so that it is easy for you to talk with others

around you face to face. The new trains run between big cities. They make the long trips much faster and

more comfortable.

     All coins have two sides. However, many passengers still won't choose the bullet trains for some reasons.

The ticket prices of the bullet trains are much higher. For an easy example, a hard seat ticket from Beijing to

Jinan is only RMB90 for T-type trains. But on the bullet trains all the seats are soft. And they cost RMB 153 to

154. On the other hand, the bullet trains stop at the small stations such as Tianjin only for one minute.

1. Passengers who take the D106 train in Tianjin have to hurry because _______.

A. it stops for three minutes

B. there are too many passengers

C. it runs too fast

D. it stops for only one minute

2. What is the most interesting part of the bullet trains?

A. The hard seats.

B. The revolving seats.

C. The beautiful colors.

D. The train tickets.

3. How long does it take to travel from Shanghai to Beijing on a bullet trains now?

A. 20 hours.

B. 12 hours.

C. 10 hours.

D. 5 hours.

4. The bullet trains make the long trips _______.

A. faster and more comfortable

B. more dangerous

C. more boring

D. cheaper

5. The bullet trains make the long trips _______.

A. faster and more comfortable

B. more dangerous

C. more boring

D. cheaper

将南极虾养殖在南沙群岛海域，结果发现其迅速死亡，原因是其生存环境可能是[ ]

A．无生物的洞穴

B．无污染的海域

C．无光源照射处

D．极低温的海水

小兰到文具店买文具，所带的钱刚好可以买6枝铅笔和11个本子，也刚好可以买8枝铅笔和7个本子，如果所带的钱全部买本子，一共可以买多少个本子？

()是指出租人购买承租人自有物，并作为融资租赁物提供给承租人使用，承租人支付租金的融资租赁形式。

A．回租赁

B．转租赁

C．不完全偿付租赁

D．直接租赁

葡萄属于（）科，枣属于（）科，梨属于（）科，阿月浑子属于（）科。