【简答题】(14分)近年来,我闽许多地区气候异常现象频发,如:云南持续几个月的干旱、北方频发的沙尘暴等,使环境问题再次成为公众的焦点 是对环境影响较大的儿种气体,对它们的合理控制和治理是优化我们生存环境的有效途径。 (1)下列做法中,有利于降低大气中的 浓度的有__________ (选填字母)。 a. 直接用煤做燃料 b. 开私家车 c. 棺树造林以增加绿化面积 d. 研究、幵发太阳能使之走进...
【简答题】If a Brazilian puts his thumb and index (食指) into a circle, it shows that he ________ you. [A] will be friends with [B] is not satisfied with [C] is willing to help [D] is satisfied with