单项选择题

The best title for the passage might be______

A．Nuclear Energy and Public Safety
B．Uranium Ore and Its Characteristics
C．Scientific Approach to Disposal of Nuclear Wastes
D．Nuclear Process and Its Wastes

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单项选择题

Hot containers of nuclear wastes to be put in Antarctic region would______

A．remain above ice sheets
B．be safe to environment
C．be highly probable
D．remain under sea

单项选择题

It is implied in the passage that the primary difficulty in seeking a safe way to dispose of nuclear wastes is caused by______

A．the nuclear process involving the danger of radioactivity at its every stage
B．fuel for nuclear reactors producing dangerous wastes
C．the weakness scientists have found in every previous methods
D．the nature of nuclear wastes together with their lengthy life span