《金史》记载:“声如雷震,热力达半亩之上,人与牛皮皆碎迸无迹,甲铁皆透。”这段材料描述的科技成就是 ( ) A.火药 B.指南针 C.印刷术 D.造纸术 答案:A材料反映的是火药的爆炸声音与威力如图所示,选出正确的单词填空。1. Where is your mouth / hand? 2. Snap your finger / legs. 3. Touch your face / eye. 4. Go to school / my house. 5. Close your book / pencil-case.