题干
—What happened to him?
— He was _________ murder last week.
A：charged of
B：guilty with
C：arrested with
D：guilty of
答案(点此获取答案解析）
D
—What happened to him?
— He was _________ murder last week.
A：charged of
B：guilty with
C：arrested with
D：guilty of
NA分子上一个基因经转录翻译后，产生一条含2000个肽键的多肽链，则该基因所含的碱基数至少是
、20只 
和3只 
。