国庆节这天,经长途客运到泰安的游客达到______人次,是平时的两倍.读作:______.
71378读作:七万一千三百七十八.
故答案为:七万一千三百七十八.
— Has ______ problem been solved?
— Not yet. We're trying to think of ______ way out, but it's quite difficult to find one. [ ]
A. a; the
B. the; a
C. a; a
D. the; the
叙述信息安全等级保护的含义。我国对于信息和信息系统的安全保护等级是如何划分的?