正常小儿的头围与胸围大致相等的年(月)龄是()。
A.出生时
B.6个月时
C.1岁时
D.2岁时
E.3岁时
参考答案:C
The cost of sales makes up a large part of the prices that _____.
A.are paid for all products
B.all products are paid
C.for which all products are paid
D.for all products paid
下图为真核生物染色体上DNA分子复制过程示意图,有关叙述错误的是()。
A.图中DNA分子复制是从多个起点同时开始的
B.图中DNA分子复制是边解旋边双向复制的
C.真核生物DNA分子复制过程需要解旋酶
D.真核生物的这种复制方式提高了复制速率