
【名词&注释】
高锰酸钾(potassium permanganate)、生活经验(life experience)、洗洁精、塑料制品(plastic products)、酒精灯(spirit lamp)、明显提高(improved obviously)、“白色污染”、铵态氮肥(ammonium nitrogen fertilizer)、玻璃棒(glass rod)、实验室用(laboratory use)
[单选题]根据你的生活经验和所学的化学知识,判断下列做法正确的是
A. 用钢丝球洗刷铝锅脏物
B. 用洗洁精洗去餐具上的油污,是因为它具有乳化作用
C. 铵态氮肥(ammonium nitrogen fertilizer)与熟石灰混合使用可以明显提高肥效
D. 深埋废弃塑料制品,可减少“白色污染”
查看答案&解析
举一反三:
[单选题]实验室用(laboratory use)高锰酸钾制氧气的实验中,不需要使用的一组仪器是( )
A. 烧杯,玻璃棒(glass rod)
大试管,集气瓶
酒精灯,铁架台
导管,单孔塞
[单选题]20.
A. of
B. to
C. for
D. from
[单选题]22. Light cannot shine through you because________.
A. it is too weak
B. your body stops it from traveling on
C. your body is tall and strong
D. there is a dark spot on the ground next to you
[单选题]I hate people _______ talk much but do little.
A. whom
B. whose
C. which
D. who
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