制备维生素C注射液时应通入气体驱氧，最佳选择的气体为（）
A.氢气
B.氮气
C.二氧化碳
D.环氧乙烷
E.氯气
参考答案：C
A funded investor has a short-term investment returning a 7 percent return. The borrowing costs are 20 basis points above the reference rate. If the T-bill rate is 3 percent and the LIBOR rate is 3.5 percent, what is the investor’s current profit on this investment()
A.3.3%.
B. 1.5%.
C. 3.8%.
因颅内压升高入院的患儿，已出现两侧瞳孔大小不等，此时正确的体位是（）
A.俯卧位
B.平卧位
C.头低脚高位
D.头肩抬高25°
E.平卧、头偏向一侧
