阅读材料,根据其内容选择正确答案。 CityHighLowWeather Beijing9-4Snowy Changchun-9-18Windy Changsha156Cloudy Chongqing139Cloudy Fuzhou2114Sunny Guilin187Rainy Haikou2217Sunny Lhasa10-5Sunny 1.Lucy wants to make snowmen. Where should she go? A. Beijing B. Lhasa C. Chongqing 2.Jim takes an umbrella with him today. He must be in__ ___. A. Changsha B.Guilin C.Fuzhou 3.Which city is the warmest? A. Beijing B.Changchun C.Haikou 4.How many cities` temperature stay above zero? A.7 已建立化学平衡的某可逆反应,当改变条件使化学平衡向正反应方向移动时,下列有关叙述中正确的是①生成物的质量分数一定增加 ②生成物的产量一定增加 ③反应物的转化率一定增大 ④反应物浓度一定降低 ⑤正反应速率一定大于逆反应速率 ⑥使用了合适的催化剂 A.①② B.②⑤ C.①②③④⑤ D.②③④⑤