This year the farmers were just able to gather in the _____ before the fine weather came to an end.

根据短文理解选择正确答案。
D
     Recently, a solar-powered (太阳能动力的） plane took to the sky for the first time. It passed an important test on the way to travel around the world.
    The plane took off from an airport（飞机场）in Switzerland. It slowly rose above the fields and into the sky.
   “There has never been an airplane of that kind that could fly—never an airplane so big, so light, using so little energy.” said Bertrand Piccard, a leader of the project.
    During the 90-minute flight (飞行）, the plane did several turns. It climbed nearly 1. 6 km above the countryside.
    Engineers（工程师） plan to test a night flight（飞行）before July. Then they will use the results（结果）of the tests to build a second plane. They plan to travel around the world in that plane in 2012.
    “We want to fly it day and night with no fuel(燃料）,” Piccard said. Piccard and pilot (飞行员）Andre Borschberg will take the plane around the world. They will make a few stops to change places and rest after a long time in the air--and to show off their airplane.
     The plane will fly at 70 km per hour on average(平均）. That is faster than a bike and slower than a car. The pilots will keep the plane in the air for up to five days at a time.

文化大革命由思想文化领域扩展到经济领域后，国民经济的发展受到严重冲击。但在1973年和1975年，我国农业生产比上一年分别增长9.2%和11.9%。出现这一历史现象的主要原因是（    ）

任选一题作文

       （一）结茧成蛹的春蚕，在软壳里期待化为彩蝶的时刻；含苞欲放的花蕾在青叶中畅想盛开如霞的未来。青春年少的我们在成长的过程中定然憧憬着美好的明天，做着这样那样的梦，诸如团圆梦、大学梦、作家梦、航天梦、强国梦……请以“我的                   梦”为题，写一篇文章。

要求：①字数不少于600字；②文体自选（诗歌除外）；③文中不得出现你所在学校的校；④字迹清晰美观，卷面整洁。

       （二）时光匆匆，脚步匆匆，初中生活，转瞬即逝。曾经，我们带着童年的幼稚上路，在青春的大道上忘情地奔跑，在知识的海洋里尽情地遨游，洒下一路汗水，留下一路欢笑；现在，我们怀揣美好的梦想，一往无前，奋勇争先。回望过去，风景无限，历历在目……请以“致我们逝去的光阴”为题作文。

       要求：①字数不少于600字；②文体自选（诗歌除外）；③文中不得出现你所在学校的校；④字迹清晰美观，卷面整洁。

．如图是一个几何体的三视图，其中正视图是腰长为2的等腰三角形，俯视图是半径为1的半圆，则该几何体的体积是                                                 （   ）