材料一：红地球葡萄粒大、色泽艳红、果肉脆硬、含糖量高，深受广大消费者青昧，近年来渭北黄土高原区形成了红地球葡萄专业产区。

材料二：渭河流域、渭河南北向基岩剖面和渭北红地球葡萄产区气象资料图。

    Mr Brown saw a sweater in a shop window. It was very cheap, so he bought it. When he got home, he put it on. It was all right and he was pleased with it.
   In the afternoon, he went to work in his garden. It soon began to rain and Mr Brown had to run into the house. He ran quickly, but he still got wet. Then his sweater started to shrink(收缩)! It got smaller and smaller. Mr Brown tried to take it off, but he couldn't.
In the end, with the help of his wife, he got out of the sweater. Mrs Brown laughed, “You see, you bought a cheap thing, but…”

苏霍姆林斯基说：“人类有许多高尚的品格，但有一种品格是人性的顶峰，这就是个人的自尊心。”以下对自尊和尊重他人的理解，不正确的是（    ）

“疑是地上霜”的“疑”的意思是（   ）。

在剧烈运动时，突然停下来会造成暂时性贫血，引起恶心、脸色苍白等现象，其原因是（　　）