为达到预期行文目的,依循特定行文关系,适应实际公务需要,而采用一定谋篇方式确定内容,并灵活运用相应技巧所作的文字表述是()。
A.文书
B.应用文
C.公文
D.文章
参考答案:C
()是指微粒中空隙及微粒间空隙所占容积与微粉容积之比。
Laura borrowed $240, interest free, from her parents to pay for her college education. If she pays back percent of this amount quarterly, and has already paid $42.00, for how many months has she been paying back her loan ?