“羌笛何须怨杨柳，春风不度玉门关。”其中“春风”指的是（    ）

Let's go to the         ．I want to buy a pencil．    

读以极点为中心的经纬网图，回答下列问题。

一个果园占地20公顷，其中的 $\frac{2}{5}$ 种苹果树， $\frac{1}{4}$ 种梨树，苹果树和梨树各种了多少公顷？

Thanksgiving Day is on the fourth Thursday of November. On that day， families and friends often get together to have a big dinner， giving their thanks to God for what they have got. It is a traditional _____ festival.