单项选择题

Not having been discovered，many laws of nature actually exist in nature．（）

A.虽然许多自然界的规律尚未被发现，但它们确实存在于自然界中。
B.存在大自然中的很多法律还没有被科学界发明出来。
C.许多自然界的规律实际上存在于自然界中，尽管不能被发现。
D.尽管很多自然界的规律没有被找出，但是这些规律实际上存在于自然界中。

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热门试题

单项选择题

What can be inferred from the passage（）

A．The sun gives off countless heat.
B．The tree could grow without the sun, but not very well.
C．People try to change solar energy into cooking fire.
D．The sun’s temperature can be as high as 6,000°F.

单项选择题

Which of the following statements is TRUE（）

A．Construction of buildings is good for trees.
B．Some trees’ trouble comes from human beings.
C．People should keep trees beautiful.
D．Trees are not disturbed by changes around them.