补骨脂中的成分主要是A．简单香豆素B．呋喃香豆素C．新木脂素D．联苯环辛烯型木脂素E

教育控制

四幅图中的现象，由于光的折射造成的是（　　）

A．

古代潜望镜

B．

手影游戏

C．

水鸟倒影

D．

看水中的鱼变浅

Have you ever suddenly felt that someone you knew was in trouble—and was he? Have you ever dreamed something that came true later? Maybe you have ESP (超感觉知觉).

ESP stands for Extra Sensory Perception. It may be called a sixth sense. It seems to let people know about events before they happen, or events that are happening some distance away.

Here's an example. A woman was ironing clothes. Suddenly she screamed, "My father is dead! I saw him sitting in the chair!" Just then, a telegram came. The woman's father died of a heart attack. He died sitting in a chair.

There are thousands of stories like this one on record. Scientists are studying them to find out what's behind these strange mental messages. Here's another example—one of hundreds of dreams that have come true:

A man dreamed he was walking along a road when a horse and carriage came by. The driver said, "There's room for one more." The man felt the driver seemed dead, so he ran away. The next day, when the man was getting on a crowded bus, the bus driver said, "There's room for one more."

Then the man saw that the driver's face was the same face he had seen in the dream. He wouldn't get on the bus. As the bus drove off, it crashed and burst into flames. Everyone was killed!

Some people say stories like these are coincidences. Others, including some scientists, say that ESP is real. From studies of ESP, we may someday learn more about the human mind.

小题1:According to the passage, the author believes that the sixth sense is_________.

A．in existence

B．imaginative

C．not real

D．impossible小题2:By studying ESP, scientists may get to_________.

A．learn how people tell lies

B．know more about human dreams

C．know more about human mind

D．learn how strange things happen小题3:In the last paragraph the underlined word "coincidences" probably means ____.

A．things that may not happen

B．things that happen in a dream

C．things that must happen

D．things that happen by accident小题4:This article is mainly about_________.

A．the human dream

B．the sixth sense

C．the human mind

D．a crowded bus

混凝土工程施工时，可采用经验配合比。

简述风成沙丘的形成