题目

短文填空 从方框中选择恰当的词，并用其适当形式填空，使短文完整、通顺，每个词限用一次。 they, time, problem, way, have, health, many, breakfast, smoke, parent How often do you have dinner with your family? Studies show that family dinner hour is an important part of (1) ________ living. When family members eat together, they are more likely (可能的) to eat (2) ________ fruit and vegetables and less junk food. When younger kids often eat dinner with (3) ________ family, they are less likely to be overweight (超重的). In the US, about one in five关于Al的叙述中，正确的是（　　）A．Al的摩尔质量是27gB．1molAl中所含原子数约为6.02×1023C．1molAl的质量是27g/molD．常温常压下，1molAl的体积为22.4L