读图题
如图所示，物体A、B质量分别是4kg和10kg，不计滑轮与绳间摩擦及绳的重力，若整个系统静止，g取10N/kg．求：
—I want to go out for a dinner. Is there a _________ near here? —Yes, there is one across from the post office.
肾脏的结构和功能的基本单位是 （ ）
