皮皮学，免费搜题
登录
搜题
【单选题】
PLC开关量输出接口中 型输出接口只能用于驱动直流负载。A.
接触器
B.
继电器
C.
双向晶闸管
D.
晶体管
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】The term power-driven vessel means _______in these Rules.
A.
any sailing vessel with propelling machiner
B.
any vessel propelled by machiner
C.
any sailing vessel with or without machinery for propelling
D.
any sailing vessel with propelling machinery not in use
【简答题】2010年某市初中毕业、升学考试各学科及满分值情况如下表：若把2010年某市初中毕业、升学考试各学科满分值比例绘成扇形统计图，则数学学科所在的扇形的圆心角是( )度
【单选题】What do we learn about deep sea mining? PASSAGE After decades of being on the back burner owing to costs far outweighing benefits, deep sea mining is now emerging as a serious threat to the stability ...
A.
Deep sea mining has generated great benefits to our life.
B.
Deep sea mining has posed a serious threat to ocean systems.
C.
Cost-effective technology for deep sea mining has been developed.
D.
A perfect penalty system for deep sea mining has been established.
【单选题】An independent bilge suction is required for _____.
A.
ballast tanks
B.
sludge tanks
C.
machinery space bilges
D.
cargo hold bilges
【简答题】某市工商局2010年8月向某汽车贸易公司购买一辆小轿车自用，支付含增值税价款234000元，代收的保险费2500元(由汽车贸易公司开具发票和有关收据)，购买者随购买车辆支付的工具件和零部件价款700元，车辆装饰费1800元。该工商局应纳车辆购置税（ ）。
【单选题】听力原文： Unwanted sound, or noises produced by airplanes, traffic, or industrial machinery, is considered a form. of pollution. Noise pollution is at its worst in densely polluted areas. It can cause hea...
A.
hearing loss
B.
high blood pressure
C.
lost productivity
D.
poor appetite
相关题目：
参考解析：
知识点：
题目纠错 0
发布
