靶式流量计是一种什么式仪表?
参考答案:
靶式流量计是一种阻力式仪表。
One-third of the country____ covered with trees and the majority of the citizens______ black people.
A.is ; are
B.is ; is
C.are ; are
D.are ; is
审计风险的特点有()。
A.客观性
B.必然性
C.无意性
D.不确定性