期货交易中套期保值的作用是() ["消除风险","转移风险","交割实物","发现价格"]
Power750最大支持的线程数量?() ["256","32","128","64"]
活塞结构应满足()等要求。 ["足够的强度和刚性","合理的形状和壁厚","最小的配缸间隙","受热面小、散热好","质量尽可能小"]
更换变桨充电电源NG5芯片所需工具物品为为() ["内六方扳手","梅花螺丝刀","端子起","美工刀"]
世界上第一张股指期货合约是有堪萨斯市交易所开发的() ["道琼斯指数期货","标准普尔指数期货","主要市场指数期货","价值线指数期货"]
肝肠循环