洋金花的主要化学成分为( )。
A．挥发油B．生物碱类成分C．黄酮类成分D．苷类成分E．鞣质类成分
参考答案：B
________ his spare time that his English has improved a lot.
A．So good use does he make of
B．Such good use does he make of
C．He makes very good use of
D．He makes so good use of
足月出生的新生儿体内铁的储备可预防4个月以内的铁缺乏。( )
