人们都知道如果身上痒,通常抓几下就能解决问题。这究竟是何原理?美国科学家通过科学实验,揭开了“痒”的奥秘。原来抓痒能让向大脑传递刺激的神经细胞变得“迟钝”,从而减轻痒感。这一事实明 ①思维和存在具有同一性 ②意识是人脑对客观事物的正确反映③实践是认识的来源 ④规律的存在和发生作用不以人的意识为转移
Frank left school at 16, he still became a successful writer.
—Does Mary only have an apple for breakfast? —Yes. She eats like a bird ______.
—Do you often watch Man and Nature on TV? —Sometimes. It’s an interesting program, but I ______ Sports News.
Hurry up! The sky is covered with black clouds. I’m afraid it ______.
The skirt ______ soft as if it is made of silk.