What's meaning of special offer？

A、起草合同

B、执行合同

C、签订合同

A、你喜欢什么？

B、这儿的特色菜是什么？

C、今天有特价菜么？

D、这儿有什么？

What is the meaning of "......the PSAs offer a virtual presence for ground crews and scientists, ...... " (Paragraph 1) ?

A．With the help of PSAs, the ground crews and scientists can present in real time in the spacecraft.

B．With the help of PSAs, the ground crews and scientists can control the spacecraft as if they were there.

C．With the help of PSAs, the ground crews and scientists cannot in real time present in the spacecraft.

D．With the help of PSAs, the ground crews and scientists cannot advise the astronauts to deal with different situations.

You can give the meaning of a word by specifying what it refers to.()

参考答案：错误

Robert didn't understand the meaning of "pet".

A．True.

B．False.

In science the meaning of the word "explain" suffers with civilization's every step in search of reality. Science cannot really explain electricity, magnetism, and gravitation; their effects can be measured and predicted, but of their mature no more is known to the modem scientist than to Thales who first speculated on the electrification of amber. Most contemporary physicists reject the notion that man can ever discover what these mysterious forces "really" are. "Electricity," Bertrand Russell says, "is not a thing, like St. Paul's Cathedral: it is a way in which things behave. When we have told how things behave when they are electrified, we have told all there is to tell." Until recently scientists would have disapproved of such an idea. Aristotle, for example, whose natural science dominated Western thought for two thousand years, believed that man could arrive at an understanding of reality by reasoning from self-evident principles. He felt, for example, that it is a self-evident principle that everything in the universe has its proper place, hence one can deduce that objects fall to the ground because that's where they belong, and smoke goes up because that's where it belongs. The goal of Aristotelian science was to explain why things happen. Modem science was born when Galileo began trying to explain how things happen and thus originated the method of controlled experiment which now forms the basis of scientific investigation.

The aim of controlled scientific experiments is ______.

A．to explain why things happen

B．to explain how things happen

C．to describe self-evident principles

D．to support Aristotelian science

In science the meaning of the word "explain" suffers with civilization's every step in search of reality. Science cannot really explain electricity, magnetism, and gravitation; their effects can be measured and predicted, but of their nature no more is known to the modern scientist than to Thales who first looked into the nature of the electrification of amber, a hard yellowish-brown gum. Most contemporary physicists reject the notion that man can ever discover what these mysterious forces "really" are. Electricity, Bertrand Russell says, "is not a thing, like St. Paul's Cathedral; it is a way in which things behave. When we have told how things behave when they are electrified, and under what circumstances they are electrified, we have told all there is to tell." Until recently scientists would have disapproved of such an idea. Aristotle, for example, whose natural science dominated Western thought for two thousand years, believe that man could arrive at an understanding of reality by reasoning from self-evident principles. He felt, for example, that it is a self-evident principle that everything in the universe has its proper place, hence one can deduce that objects fall to the ground because that's where they belong, and smoke goes up because that's where it belongs. The goal of Aristotelian science was to explain why things happen. Modem science was born when Galileo began trying to explain how things happen and thus originated the method of controlled experiment which now forms the basis of scientific investigation.

The aim of controlled scientific experiments is ______.

A．to explain why things happen

B．to explain how things happen

C．to describe self-evident principles

D．to support Aristotelian science

What is the original meaning of "birdbrained" and what does it mean here in the first paragraph?

A．Naive; intelligent.

B．Simple-minded; volant.

C．Narrow-minded; navigational.

D．Stupid; adapted for flight.

听力原文： In science the meaning of the word "explain" suffers with civilization's every step in search of reality. Science cannot really explain electricity, magnetism, and gravitation; their effects can be measured and predicted, but of their nature is no more known to the modem scientists than to Thales who first looked into the nature of the electrification of amber, a hard yellowish-brown gum. Most contemporary physicists reject the notion that man can ever discover what these mysterious forces "really" are. Electricity, Bertrand Russell says, "is not a thing, like St. Paul's Cathedral; it is a way in which things behave. When we have told how things behave when they are electrified, and under what circumstances they are electrified, we have told all there is to tell." Until recently scientists would have disapproved of such an idea. Aristotle, for example, whose natural science dominated western thought for two thousand years, believe that man could arrive at an understanding of reality by reasoning from self-evident principles. He felt, for example, that it is a self-evident principle that everything in the universe has its proper place, hence one can deduce that objects fall to the ground because that's where they belong, and smoke goes up because that's where it belongs. The goal of Aristotelian science was to explain why things happen. Modem science was born when Galileo began trying to explain how things happen and thus originated the method of controlled experiment that now forms the basis of scientific investigation.

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A．To explain why things happen.

B．To explain how things happen.

C．To describe self-evident principles.

D．To support Aristotelian science.