学校开展“学雷锋做好事4人小组活动”.报名参加人数是:男生21人,女生27人.一共可分成几个小组?
(21+27)÷4
=48÷4,
=12(个);
答:一共可分成12个小组.
流行性斑疹伤寒的实验室诊断方法常选()
A.血常规
B.病原体接种分离
C.外斐反应
D.肥达反应
E.补体结合试验
—What do you think of the concert —I really enjoy it. I didn't expect it was ______ wonderful.
A. as B. moreC. most D. very