【单选题】Britain, in ______ with many other industrialized countries, has experienced major changes over the last 100 years. [ ]
【简答题】下列清洗方法中,不属于乳化原理的是( ) A.用盐酸清除水垢(碳酸钙) B.用洗涤剂清洗餐具 C.用肥皂液洗衣服 D.用洗发液洗头
【单选题】There is ________ snow in the northern part of China. [ ]
【单选题】下列叙述正确的是( )
B.
某物质的摩尔质量在数值上等于该物质的相对分子质量或相对原子质量
C.
3.01×10 23 个N 2 分子的质量为14g
D.
标准状况下,1 mol任何物质的体积均为22.4L
【单选题】Many paratroopers landed in the wrong place because _______.
A.
the pathfinders had been blown away from the correct landing sites
B.
of enemy anti-aircraft fire