海椰树原产于普拉兰岛及库瑞岛,树高20~30米,树叶呈扇形,宽2米,长可达7米,被称为“树中之象”。海椰树约长20年后才会结果,其果实海椰子约需8年才能成熟,重量可达20千克,沉落到海洋里的海椰子只有在腐烂后才会浮出水面。目前,只有普拉兰岛的五月谷还有4000多棵海椰子树,已被当地政府划为“天然保护地”,私人不得擅自采摘、出售、出口海椰子。

    海椰树周身是宝。树叶可用来编织席子、篮筐、帽子等日常用品;椰壳质硬有光泽,可加工成盘、杯等容器,还可雕刻上花纹,加工成精美的手工艺品;果汁香醇可口,是上好的甜食;果肉可做汤料并具有药用功效。下图为普拉兰岛及库瑞岛位置示意图。

在1926年印度放弃银本位制之后，中国在当时成为世界上最主要的以银为货币的国家。1929﹣1933年我国白银流动情况表（单位：百万美元）

数据来源：中国银行《商此和金融月报》（1929﹣1935年）

据上表可知（    ）

阅读短文，下列问题

B

    Jilin Province is located(位于) in China's northeast. It has a long winter with snow that can last for seven months a year. Many people go to Jilin for the Ice Lantern Festival and winter sports.

    Jilin also has many natural and historical attractions, including the famous Mount Changbai. 

    The following is one of the top 10 attractions in Jilin.

    Located in the southeast of Jilin City, Jilin Province, Songhua Lake is one of the most famous artificial (人工的) lakes in China. 

    Covering a total area of 550 square kilometers, the lake has a maximum water capacity (最大蓄水量 ) of 10.8 billion cubic meters. The lake, which looks like a string of pearls, is 200 kilometers in length, 10 kilometers at its widest point, and 75 meters at its deepest point.

    The Songhua Lake consists of nine scenery zones, including Wuhu Island, Wolong Pond, Fengwu Pond, Shilong Wall, Hailang Hill, Shuangfeng Ridge, Luotuo Peak,Qingshan Hill and North Heaven Gate. It is a perfect place for people to visit.