题目

阅读理解 A new study suggests that people who drank a certain amount of alcohol（酒）had a lower risk of cancer and death than those who drank more or none during a nine-year period. And with each additional drink a week, the risk of cancer and death from any cause increased, the scientists reported. However, the study found only an association between alcohol and cancer and death, and did not prove cause and effect, the researches said. What sets the new study apart, said lead study author Andrew Kunzmann, is that previous studies looked at cancer and death separately. “What our stud丰富多彩的材料使我们的生活更美好。 （1）生产硅酸盐水泥和普通玻璃都用到的主要原料是        (填名称)。 （2）生活中有大量的铝制品。家用铝锅不能经常用热碱水洗涤去污，原因是（用离子方程式表示）                                                                      。 （3）鉴别真假羊毛衫的方法是先取样，再_____                                _____。