【单选题】The author likes to work on his own while turning off the phone.
【单选题】如图电路所示,通过10Ω电阻的电流 等于
【单选题】在电子行业的自动生产线中广泛地应用了气动技术,其优点是()。
B.
精确度高、气动元件容易制作、便于集中供应和输送
C.
气动元件容易制作、便于集中供应和输送、传动反应快
【多选题】机床夹具的作用有哪些? (多选) A 、缩短辅助时间,提高劳动生产率 B 、确保并稳定加工精度,保证产品质量 C 、降低对操作工人的技术要求和工人的劳动强度 D 、机床的加工范围得到扩大
【简答题】The author likes to use his cell phone, his ATM card, his voice mail and his email account, which he thinks are ______ for what they are intended to do.
【简答题】节流阀通常采用 小孔;其原因是通过它的流量与 无关,使流量受油温的变化较小。