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【多選題】
科學(xué)家最近制造出第112號新元素，其原子的質(zhì)量數(shù)為277，這是迄今已知元素中最重的原子。關(guān)于該新元素的下列敘述正確的是
A.
其原子核內(nèi)中子數(shù)和質(zhì)子數(shù)都是112；
B.
其原子核內(nèi)中子數(shù)為165，核外電子數(shù)112；
C.
其原子質(zhì)量是12C原子質(zhì)量的277倍
D.
其原子質(zhì)量與12C原子質(zhì)量之比為277:12
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舉報參考答案：
舉一反三
【單選題】What kind of book does the girl want to read?
A.
A book about animals.
B.
A book on dolls.
C.
A book about candy and cookies.
【單選題】How many students mentioned in paragraph were shot dead in 1997 in US schools?
A.
Nine.
B.
Ten.
C.
Twelve.
D.
Twenty-two.
【單選題】What are the speakers probably doing?
A.
Listening to a speech.
B.
Singing.
C.
Memorizing words.
相關(guān)題目：
【單選題】What kind of book does the girl want to read?
A.
A book about animals.
B.
A book on dolls.
C.
A book about candy and cookies.
【單選題】How many students mentioned in paragraph were shot dead in 1997 in US schools?
A.
Nine.
B.
Ten.
C.
Twelve.
D.
Twenty-two.
【單選題】What are the speakers probably doing?
A.
Listening to a speech.
B.
Singing.
C.
Memorizing words.
參考解析：
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