下列叙述错误的是( ) A.通常情况下,分子式为C63H103O45N23S2的多肽化合物中最多有22个肽键 B.一条由n个氨基酸组成的肽链中含有的氮原子数目和氧原子数目至少都为n C.n条由m个氨基酸组成的肽链中,完全水解共需要(m-n)个水分子 D.两个氨基酸脱水缩合过程中失去的水中的氢来源于氨基和羧基中的氢All the students _____two groups by the teacher during
the competition.
A.were divided
into
B.were divided
C.divide into
D.divided into