婴儿的右侧支气管较垂直,因此异物较易进入右侧支气管。
参考答案:对
流行性斑疹伤寒何时传染性最强()
A.病后第1周
B.病后第2周
C.潜伏期末
D.病后第4周
E.病后第3周
_____ it take you to walk from your home to your office? [ ]
A. How long is
B. How far is
C. How long does
D. How far does