孕妇HBeAg(+),对其新生儿最好应注射()。
A.丙种球蛋白
B.HBIG+乙型肝炎疫苗
C.干扰素
D.胎盘球蛋白
E.乙型肝炎疫苗
参考答案:B
近似数4.30是精确到( )分位,有( )个有效数字.
John was given the same suitcase his father and grandfather ___ with them to school.
A.took
B.had taken
C.were taking
D.would take