与航天航空等空间技术相比较，地震预测仍是世界性难题。要准确预测地震的发生，需要在正确的世界观和方法论指导下，发展地震科学，深入研究地壳运动规律。这是因为（   ）

小明参加学校田径队进行短跑训练，王老师为了帮他进一步提高成绩，对他的百米成绩进行了分析测试．在每隔20m处安排了一个计时员，各计时员在发令员鸣枪时起动秒表，跑经指定位置时按停秒表，他们的读数分别是2.9s、5.5s、7.9s、10.7s、12.8s．通过这些数据可知道：

阅读短文，完成练习。

小鸟想要的家

    星期天的下午，我坐在阳台上画画。

    我用绿色的水彩笔在纸上画一片森林，森林碧绿碧绿的，树木长得十分茂盛。

    我在森林的上面画上蓝蓝的填空，又添上几朵白云。

    在森林里，我又画上了几只小鸟，黄黄的羽毛，红红的嘴巴，真可爱。

    我给自己的画写上题目：小鸟想要的家。

阅读下面短文，从各题所给的A、B、C、D四个选项中选出最佳选项。
B
Join Us for a Day at Sun Valley Amus ement Park

    Children aged 10 to 14 are invited to take part in the "Event of the Summer" at
Sun Valley Amusement Park, the most popular amusement park on the East Coast.
Sun Valley has more than 80 amusement rides. For sports lovers, there are
basketball courts, an indoor baseball field and climbing walls.
    No amusement park would be complete without a gift shop. Sun Valley
has two.
    You won't want to miss out on this day of fun. Join us at Sun Valley Amusement Park on July 14. Register (登记) early.
    • The cost of the trip is $ 25. This includes tickets and all rides.
    • We suggest that all children bring lunch.
    • Buses leave at 9.00 AM and return at 5.00 PM.
    • Rain Date: Wednesday, July 16.
    Register at the Children's Recreation Center at the Town Hall by July 3.
    A one-day registration will also be held on July 1 at the Brown School.
    For more information, call Jane Parks at 555-7267.

根据所学知识填空：