皮皮学，免费搜题
登录
搜题
【多选题】
（多选）以下各项中哪几项是设计板时应考虑的（）A.
尽量使流量系数不随雷诺数而变
B.
尽可能减小阻力损失
C.
尽量减小管子的相对粗糙度
D.
尽量保证压差的测量精度
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which of the following outcomes is typical of a price ceiling that is set below the market equilibrium price?
A.
Less of the good is produced with the price ceiling than would be produced without it.
B.
The price ceiling has no effect on the market equilibrium.
C.
Consumers can buy more than the market equilibrium quantity because the price ceiling is below the market price.
D.
More of the good is produced with the price ceiling than would be produced without it.
【单选题】A binding price ceiling creates
A.
a shortage
B.
a surplus
C.
an equilibrium
D.
a shortage or surplus depending on whether the price ceiling is set above or below the equilibrium price.
【单选题】If a price ceiling is a binding constraint on the market,
A.
the equilibrium price must be below the price ceiling.
B.
the equilibrium price must be above the price ceiling.
C.
the forces of supply and demand must be in equilibrium.
D.
it will have no effect on supply or demand.
【单选题】有关超声生物显微镜(UBN)的描述,错误的是( )
A.
它是50Hz的高频率分辨率的B超
B.
用于眼前段的疾病辅助诊断
C.
其因穿通力高可用于眼后节疾病辅助诊断
D.
它对闭角型青光眼、恶性青光眼诊断有意义
E.
有利于对眼前段肿瘤诊断
相关题目：