单项选择题

Which of the following flavors of ice cream is NOT mentioned by Simon

A．Vanilla.
B．Strawberry.
C．Butter bacon.
D．Chocolate browni
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单项选择题
Which of the following does NOT help to separate the useful U-235 and nearly useless U-238
A．The principle of gaseous diffusion.
B．A process involving magnetic separation of the two isotopes.
C．A process nearly identical in the chemical makeup.
D．A gas centrifug
单项选择题
______ with enough instruments necessary for the experiment, these scientists are expecting to finish it ahead of time.
A．To be supplied
B．To supply
C．Supplying
D．Supplied
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