血细胞分析仪白细胞三分群的第二群主要包括了()。
A.单核细胞
B.嗜酸性粒细胞
C.嗜碱性粒细胞
D.幼稚细胞
E.中性粒细胞
参考答案:A, B, C, D
简述脑的可塑性含义。
–Peter has good grades in all his subjects, but he never shows off.
–I agree. He is very _________.
A.easy-going
B.imaginative
C.modest
D.generous