美国科研人员2016年2月11日宣布，他们利用激光干涉引力波天文台（LIGO）于去年9月首次探测到引力波，证实了爱因斯坦100年前所做的猜测．在爱因斯坦的描述中，有质量的物体会使它周围的时空发生扭曲，物体质量越大，时空就扭曲的越厉害．当有质量的两物体加速旋转的时候，他们周围的时空会发生起伏，震颤，波浪…这种“时空扰动”以波（涟漪）的形式向外传播，这就是“引力波”．其实只要有质量的物体加速运动就会产生引力波，不同方式产生的引力波的波长是不一样的．

引力波是以光速传播的时空扰动，是横波．引力波和物质之间的相互作用极度微弱，因此它的衰减也是极度缓慢的．引力波的发现为我们打开了研究宇宙的全新窗口，引力波携带着与电磁波截然不同的信息，将为我们揭示宇宙新的奥秘．根据上述材料做下列推断，其中一定错误的是（   ）

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April 12th

Dear Diary,

    Today was Sunday. In the morning I was going to have a picnic with my friends. But it was rainy. So I had to stay at home. I washed my clothes and cleaned the floor. After finishing the work, I was very tired.

    At three o'clock in the afternoon, my cousin Sarah asked me to see a film. I was happy. But I didn't find my pet kitten. Sarah and I looked for him here and there. Guess! Where was he? He was in my cap! When we came to the cinema, it was about four thirty. What a bad day!

Mary

判断（1）~（3）的正误，回答（4）、（5）的问题：