【判断题】遇到险情,应由导游人员保护车辆和游客,司机去求媛。
【单选题】For a balanced three-phase △ -connected load, the average power absorbed by the load is P . Change the △ -connected load to Y-connected load, the power will :
【单选题】The load on the crosshead pin is always ______, so it is the ______ half of the bearing which is subject to wear.
【判断题】生长的最适温度是指生长最快的温度,对健壮生长来说,也是最适宜的。
【单选题】下列关于胫前动脉和足背动脉的描述,错误的是
D.
其体表投影为:胫骨粗隆与腓骨小头连线中点至足背内、外踝连线的中点为胫前动脉;自足背内、外踝连线中点至第1、2跖趾关节间的连线为足背动脉
E.
在内、外踝连线中点向深部压迫足背动脉,可止血