栽植野牛草常用（）方法。
A.点栽
B.条栽
C.片栽
D.点栽或条栽
参考答案：D
On their way to the reception building, all the athletes were amazed _______ so many volunteers ____
their help. [ ]
A. finding; politely offering
B. to find; polite to offer
C. finding; politely to offer
D. to find; politely offering
影响通信消费者购买行为的因素有（）、（）、（）。
