【单选题】The __________people even keep the custom of offering nine-layer cakes to their ancestors on Winter Solstice.
【单选题】People like to eat mutton on Winter solstice because it can help them ________
D.
provide nutrition to the body
【简答题】炉外精炼加热目的是为了补偿钢水的__________,保证精炼任务的完成。
【单选题】向 1 毫升 pH=1.8 的盐酸中加入水()才能使溶液的 PH=2.8。
【判断题】On Winter Solstice, the sun reaches its southernmost point, the northern hemisphere has the shortest day.
【判断题】On Winter Solstice, there is a saying that goes “Eat dumplings on Start of Winter Day, or your ears will be frostbitten”.
【单选题】Eating dumplings on winter solstice is a custom to commemorate________
【简答题】会展组织者与参展商之间签订的主要是什么合同?
【单选题】向1毫升pH=1.8的盐酸中加入()mL水才能使溶液的pH=2.8。