You can see a wide r____ of animals in the newly built zoo.
“节能”是建设节约型社会的要求。由于人们观念上的差异,人们对墙体和屋面的保温性能长期以来并不关注,不少地方节能型房屋的推广进展缓慢。这告诉我们( )
— The match is so exciting. The opposite team is really strong.
— You’re right. But I am sure our team will win!
对十二烷基苯磺酸钠 是常用洗涤剂的主要成分.其结构可用图形来表示,•端为链烃基,O端为极性基.根据这一结构特点,试分析和回答下列问题: