乘坐直升飞机时，永远从前方飞行员能够看见你的地方走进飞机，不要藏在飞机后面。
参考答案：对
丝及绢丝制簇绒织物
Robert Frost described () as "a book of people", which shows a brilliant insight into New England character and the background that formed it.
A. North of Boston
B. A Boy’s Will
C. A Witness Tree
D. A Further Range
