胎黄的发病与下列哪一脏腑无关：
A．肝
B．胆
C．胃
D．肾
E．脾
参考答案：D
At times ,worrying is a normal, ________response to a difficult event or situation—a loved one being injured in an accident , for example.
A．effective
B．individual
C．inevitable
D．unfavorable
土壤化学污染中最主要的问题是
A．有机磷B．酚C．有机氯农药D．硫酸铵E．氯化铵
At times ,worrying is a normal, ________response to a difficult event or situation—a loved one being injured in an accident , for example.