遇婴儿气道堵塞需要急求时,应采用背部叩击法。()
参考答案:对
下列属于上海发展钢铁工业的有利条件是( )
A.丰富的煤碳资源
B.丰富的铁矿资源
C.丰富的淡水资源
D.便利的交通运输
Tonny is afraid _____, because he was bit by a dog. [ ]
A. fly
B. to flying
C. flying
D. of flying