延边三角形启动的启动转矩比Y-△启动的启动转矩()。 ["差不多","大","小","大很多"]
LKJ的车载软件程序存储器为()。 ["A、RAM","B、ROM","C、EPROM","D、EEPROM"]
系统不支持持卡人将惠农卡密码设置为()简单密码。 ["6个0-9","123456","持卡人生日","身份证后六位"]
关于吸痰,正确的是() ["吸痰顺序:先吸口鼻腔,再吸气管内","吸痰时,应带负压插管","吸痰时间为每个部位不超过30秒","机械通气患者吸痰前后应给予高浓度氧气吸入","吸痰后要进行肺部听诊,如有痰液,应立即继续吸痰"]
通常将马氏体占()的地方定位淬硬层的边界 ["100%","90%","80%","50%"]
简述幼儿思维的基本特点。