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【单选题】
下列有关127 53I和131 53I说法，正确的是A.
127 53I和131 53I的核外电子数不同
B.
127 53I和131 53I的中子数分别为127和131
C.
127 53I和131 53I互为同位素
D.
127 53I和131 53I是同一种核素
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【单选题】However, Mr. Martin had no sooner moved into the prime minister’s residence in Ottawa’s Sussex Drive ______ things began to go wrong.
A.
as
B.
as when
C.
than
D.
until
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