问卷的作用就是作为（）的工具，从而获得第一手资料。
A．提问
B．提问、记录
C．提问、记录和编码
D．提问、记录、编码和分析
参考答案：B
存在于煤中的元素虽然不下数十种之多，但是煤中有机组分中的主要元素是碳、氢、氧、氮、硫等五种。
Have you seen Henry lately? My boss wants to know ______.
A．how is he getting along
B．what is he getting along
C．how he is getting along
D．what he is getting along
