关于存储保护说法正确的是（）。 ["以硬件为主，软件为辅","以软件为主，硬件为辅","以软件实现","不需要任何软件"]
对“交换”理解正确的是（） ["至少要有两方","只有买方才能自由接受或拒绝对方的产品","每一方都能沟通信息和传递货物每一方都有","被对方认为有价值的东西"]
水稻一般在（）停灌，黄熟初期排干。
金库区域安装与110报警服务台相连的紧急报警装置，启动紧急报警装置时应能（）。 ["同时启动现场声、光报警装置","启动报警喇叭","启动光报警","不触发现场声、光报警，以防吓跑罪犯"]
One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）. ["the extra weight required for the diesel reduction gearing","a minimum speed for the engines that limits the minimum speed of the vessel","the higher fuel consumption per SHP","the low efficiency of the system when a controllable pitch propeller is used"]
水稻返青后，以（）灌溉为主；在分蘖期灌（）cm浅水，以浅水增温促蘖，实现分蘖早生快发。
