A pair of spectacles()what I need at the moment. ["is","are","has","have"]
下列碳钢无损检验方式中,()是强制性的。 ["超声波检验","射线检验","磁粉检验","外观检验"]
Activty和Task的启动模式有哪些?() ["standard、singleTop","singleTop、singleTask","singleTask、singleInstance","standard、singleTop、singleTask、singleInstance"]
属于经营增长状况评价的基本指标包括()。 ["销售(营业)增长率","资本保值增值率","应收账款周转率","净资产收益率","资产负债率"]
据英国技术预测专家J·马丁测算,人类的知识,目前是每几年就增长一倍() ["3年","4年","5年","10"]
配煤的意义?