单项选择题

The passage says that until recently scientists disagreed with the idea ______.

A．that there are mysterious forces in the universe
B．that man cannot discover what forces "really" are
C．that there are serf - evident principles
D．that we can discover why things behave as they do
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单项选择题
The word it in Line 3, Para 3 probably refers to ______.
A．the lid
B．coffee -maker
C．the brewing process
D．the model
单项选择题
Which of the following statements can be inferred from the passage
A．People used to drink coffee in larger quantities.
B．It is essential to attach a separate carafe, while "drip" coffee makers are applied.
C．People used to make a pot of coffee in the morning and drink it up.
D．The new coffee makers usually cost less than before.
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