阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项。

    Four seasons make a year. They a re spring, summer, autumn and winter. 

    Spring is a beautiful season. It's from March to May. In spring, trees turn green and flowers come out. Everything looks new.

    Summer is a happy season. It's from June to August. The weather is hot, so people usually wear cool clothes, go swimming and eat ice cream.

    Autumn is a colourful season. It is from September to November. In autumn, leaves on trees turn yellow. Sometimes they are yellow and red. The colours are beautiful.

    Winter is the last season. It's from December to February. In China, the weather is not the same in winter. In Beijing, it's very cold. It often snows. People often play with snow and go skating in rivers and lakes. Skating is their favorite sport in winter. But in Haihan, it's not very cold. It's very warm. People there can go swimming in the sea.

3.5×103

＝3.5×100＋3

＝350＋3

＝353

北京中关村是我国第一个国家级高新技术产业开发区。北京发展高新技术产业的优势是（　　）

阅读下面文段，完成各题。

    【甲】亮躬耕陇亩，好为《梁父吟》。身长八尺，每自比于管仲、乐毅，时人莫之许也。惟博陵崔州平、颍川徐庶元直与亮友善，谓为信然。

    时先主屯新野。徐庶见先主，先主器之，谓先主曰：“诸葛孔明者，卧龙也，将军岂愿见之乎？”先主曰：“君与俱来。”庶曰：“此人可就见，不可屈致也。将军宜枉驾顾之。”

    由是先主遂诣亮，凡三往，乃见。因屏人曰：“汉室倾颓，奸臣窃命，主上蒙尘。孤不度德量力，欲信大义于天下；而智术浅短，遂用猖蹶，至于今日。然志犹未已，君谓计将安出？”          （节选自《隆中对》）

    【乙】蜀赵云，字子龙，身长八尺，姿容雄伟。居刘备前锋，为曹公所围，乃大开门，偃旗鼓。曹公引去，疑有伏兵。云于后射之，公军大骇，死者甚多。备明日自来，视昨日战处，曰：“子龙一身都是胆也。”（节选自《太平广记•赵云别传》