A:than more on efficiency
B:and more efficiency
C:and more on efficiency
D:than efficiency
小飞同学想研究小灯泡的发光亮度与实际电功率的关系,选取了一个标有“2.5V”、额定功率约为1W的小灯泡和必要的实验器材.
用所给词的正确形式填空。There is a great chance for you____ (meet) the famous athlete .It’s easy for you ____ (finish) the work on computers .There are many birds ____ (sing) happily in the tree .They spent a long time ____ (argue) about the boring things .I ____ (visit) my good friend at this time last night .
西亚最丰富和最缺乏自然资源分别是( )
只有有权威的政府才能取得人民的信任,造福于人民。区别政府有无权威的根本标志是( )
— Three days________.