静力学基本方程式Z+p/γ=c中P/γ的含义是()
A.测压管水头
B.位置水头
C.压力水头
D.管路损失
参考答案:C
血浆胶体渗透压主要由下列哪项形成()
A.球蛋白
B.白蛋白
C.氯化钠
D.纤维蛋白原
The Customs surveillance zone include the following places except ().
A. any seaport, railway and high way station, airport, border pass or international postal matter exchange where there is a Customs establishment
B. any place where Customs control is conducted
C. any place without a Customs establishment but which has been approved by the state council as a point of entry and exit
D. any place along the border of the country