如图为原来置于黑暗环境中的绿色植物曝于光下后。根据其吸收CO2量制成的曲线。下列叙述正确的是（ ） A．曲线AB段表示绿色植物没有进行光合作用
从溴水中提取溴可以采用的方法是（）。 A.萃取 B.蒸发 C.蒸馏 D.过滤
She goes to school every day _______ Sunday.A. except B. besides C. beside D. except for
下面是某权威资料统计、预计世界人口数量的一组数字，请根据表格内容写一个描写地球状况的比喻句。 10万年前300年前1987年前1999年前2025年前2095
有甲，乙两家健身中心，两家设备和服务都相当，但收费方式不同．甲中心每小时５元；乙中心按月计费，一个月中30小时以内（含30小时）90元，超过30
She locked her room _____ a thief would break into it. A. in case that B. for fear that C. in case of D. for fear of
---How did you _____ the old valuable house? ---It used to be _____my uncle. He left it to me in his will. A. take possession of ; in possession of B. take the possession of ;
It _______ we had stayed together for a couple of weeks _______ I found we had a lot in common. A. was until; when
