【单选题】As the economy is getting better and better,there are more and more jobs _______.
【单选题】At the starting stage, the EOL will get information from______.
A.
all the Web sites available
B.
Databases built up by its creators
C.
Nonscientist with specialized knowledge
D.
the existing scientific databases
【单选题】几何公差带是指限制实际要素变动的 ( )
【判断题】W3C规定事件流的传播方式为,先事件冒泡然后事件捕获,最后事件处理。