单选题
In the phenomenon of atomic fission, the nucleus is split into two pieces of
approximately
equal mass.
A、
doubly
B、
always
C、
solidly
D、
about
【正确答案】
D
【答案解析】
画线词approximately的意思等于D．about，即“大约、将近。”正确答案为D。辨义：A．doubly两倍的；B．always总是；C．solidly坚固地。
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