机械设备上各种安全防护、保险限位装臵及安全信息装臵必须齐全有效

如图所示，一矿泉水瓶，装满500g水后，放在水平桌面上静止不动，若空瓶的质量为50g，瓶与桌面的接触面积为10cm²，则桌面对瓶的支持力为　 　N，瓶对桌面的压强是　  　Pa．把水倒满一个高10cm的薄纸杯，杯底受到的水的压强是　 　Pa．如果在瓶侧壁不同高度的地方用锥子扎出上、下两个小孔，打开瓶盖，可以观察到从　 　（填“上”或“下”）孔流出的水喷得较急．（取g=10N/kg，水的密度为1.0×10³kg/m³）

____ homework , most students do homework every day.

A．To

B．As for

C．For

D．As

欧洲陆上有“十字路口”之称的国家是

A．英国

B．法国

C．德国

D．意大利

黑盒、白盒测试法是常用的软件测试方法，其中白盒测试主要用于测试 (51) 。

A．结构合理性

B．软件外部功能

C．程序正确性

D．程序内部逻辑

One-year-old Susan, the second child to have sickle cell disease in a family of five children, is admitted to the hospital with sickle cell crisis. When preparing the plan of care for her, which of the following treatments would the nurse most likely expect to include in the plan()

A. Intravenous fluid therapy.

B. Fast-acting anticoagulant therapy.

C. Parenteral iron therapy.

D. Exchange transfusion.