Mike was singing _________ his twin brother at that party.
A:as beautiful as
B:so beautiful as
C:as beautifully as
D: so beautifully as
一动物精原细胞在进行减数分裂过程中形成了4个四分体,则次级精母细胞中期染色体、染色单体和DNA分子数依次是
—Yes, it is __________. It is new.