星期天家里来了一些客人，明明准备了10根筷子。吃饭时有几个人？
10÷2=5（个）
Sunshine Park is a beautiful place ________ a big lake and many trees. [ ]
A. has
B. have
C. there is
D. with
列举影响拉伸试验结果的主要因素。
