可经乳汁进入乳儿体内的毒物是
A．铅和汞B．刺激性气体C．二氧化硅D．有机溶剂E．高分子聚合物
参考答案：A
—Excuse me. Could you tell me ________?
— Sorry, I am new here.
A．where the hospital is
B．where is the hospital
C．where the hospital was
D．where was the hospital
