（1）234吨=2吨750千克；
（2）2升50毫升=2.05升．
故答案为：2，750，2.05．
Only after I sent out scores of job application _______ an offer from a small company.
A．had I receive
B．did I receive
C．I had received
D．I received
铵态氮肥中氮元素以（）的形态存在
A.硝酸根
B.铵离子
C.酰胺态
D.氨水
