【单选题】在Windows7中,所有输入法之间切换的快捷键是()
【单选题】.The teacher recommended that every student England party.
B.
takes active part in C . take active part in D. would take active part in
【单选题】Answer the questions about the words. 2 In an atmosphere of political radicalism, will students be (a) active, or (b) not very active?
【单选题】A knowledge of the composition of the weed community ______.
A.
is essential to the efficient control of weeds
B.
may lead us to be aware of the fact that the soil contains enormous quantities of seeds of numerous species
C.
helps us to have a good idea of why seeds can lie dormant for years
D.
provides us with the means to identify weeds at the seedling stage
【单选题】在WINDOWS 7中所有输入法之间切换,应使用( )
【单选题】The ratio of the work done by the machine ______the work done on it is called the efficiency of the machine.