产后小便不通常见的临床症状有 （） A.恶寒发热 B. * * 口疼痛 C.以上

在平面直角坐标系中，将二次函数的图像向下平移2个单位，所得图像的解析式为[ ]

A．

B．

C．

D．

ZPW1-18型无绝缘移频自动闭塞，室内发送电源盒功入电压（）。

A、AC150V～210V

B、DC150V～210V

C、AC200V～260V

D、DC200V～260V

30岁男性，冠折2／3，已行根管治疗，无松动，患牙咬合紧，适宜的桩冠修复是（）

A.成品桩桩冠

B.弯制冠桩桩冠

C.多桩桩冠

D.金属舌面板桩冠

E.1.2mm不锈钢丝弯制桩冠

简述备皮的步骤。

In order to increase revenues, an airport plans to change the parking fees it charges at its hourly parking lots. Rather than charging $2.00 for the first two-hour period, or part thereof, and $1.00 for each hour thereafter, the airport will charge $ 4.00 for the first four-hour period, or part thereof, and $1.00 for each hour thereafter.
Which of the following is a consideration that, if true, suggests that the plan will be successful in increasing revenues

A．Very few people who park their cars at the hourly parking lot at the airport leave their cars for more than two hours at a time.

B．Over the past several years, the cost to the airport of operating its hourly parking facilities has been greater than the revenues it has received from them.

C．People who leave their cars at the airport while on a trip generally park their cars in lots that charge by the day rather than by the hour.

D．A significant portion of the money spent to operate the airport parking lot is spent to maintain the facilities rather than to pay the salaries of the personnel who collect the parking fees.

E．(E) The hourly parking lots at the airport have recently been expanded and are therefore rarely filled to capacity.