可用2%～4%碳酸氢钠洗胃的毒物是（）
A.敌敌畏
B.灭鼠药
C.氰化物
D.敌百虫
E.巴比妥类
参考答案：A
Bottle-feeding babies can ____ adult obesity, says study Research shows using formula can
cause health problems in later life. [ ]
A. lead to
B. stick to
C. object to
D. turn to
移动台功率等级信号共规定（）个功率由于等级
A.2
B.3
C.4
