蓼大青叶的气孔多为
A．直轴式 B．不定式 C．不等式 D．平轴式 E．环式
参考答案：D
We have _ homework to do every day. [ ]
A. too much
B. too many
C. much too
治疗ADHD的一线药物为
A．丙米嗪B．苯异妥英C．苯妥英钠D．哌醋甲酯E．氯丙嗪
