单项选择题

What can be concluded from the passage

A．Scientists' discoveries always change people's belief.
B．There are too many secrets to be discovered.
C．Megalodon may be still alive deep in the ocean.
D．"Deep sound channel" allows sound waves to travel undisturbed.

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热门试题

单项选择题

The woman stealing perfume ________.

A．guessed what the sputniks were for
B．was frightened by its shape
C．could see the camera filming her
D．knew that the detective bad seen her

单项选择题

The sputniks hanging from the ceiling are intended ________.

A．to watch the most desirable goods
B．to make films that can be used as evidence
C．to frighten shoplifters by their appearance
D．to be used as evidence against shoplifters