巨幼红细胞性贫血应选用
A．维生素KB．肝素C．叶酸D．垂体后叶素E．链激酶
参考答案：C
You should try to speak English as as possible. [ ]
A. often
B. more
C. many
D. long
如图，在边长为1个单位长度的小正方形组成的网格中，将△ABC向右平移4个单位，请在方格纸中画出平移后的图形△A1B1C1．
