[填空题] 原材料脱离定额的差异，是按（）反映的（）。

普通三角形螺纹的牙型角（） ["50°","55°","60°"] 期货市场一般由（）构成。 ["交易所","代理人","清算所","交易者","经纪人"] An organization hires a contractor who only needs access to email and a group calendar. They do not need administrator access to the computer. Which VPN model is the most appropriate?（） [" Thin Model"," Thick Client"," Port Forwarding"," Clientless Access"," Layer 3 Network Acce"] 按使用方式的不同，一般把压力容器分为（）。 ["反应容器和贮运容器","固定式容器和移动式容器","换热容器和分离容器","一类容器和二类容器"] 光合作用的过程中，氧气释放是发生在（）。 ["固定CO_{2<\/sub>时","还原CO2<\/sub>时","暗反应阶段","光反应阶段"] 原材料脱离定额的差异，是按（）反映的（）。}