【简答题】A.He likes kids and has worked in a children's camp. B.He is lazy and immature but good in a cr. C.He quarrels with everyone he works with. D.He is immature and loves playing tricks on people.
【判断题】为了避免日后发生争议,在订立合同的数量条款时最好规定数量机动幅度条款。 ( )
【判断题】变压器是一种与电动机一样能输出机械运动的电气设备。 ( )
【判断题】当晶核长大时,随过冷度的增加,晶核的长大速率增大。但是过冷度很大时,晶核长大速率很快减小。
【判断题】有数据表明,维护一个老客户再次购买的成本,是开发一个新客户成本的 1/7。( )
【判断题】当晶核长大时,随过冷度的增加,晶核的长大速率增大。但是过冷度很大时,晶核长大速率很快减小。
【单选题】He's worked here _______________ three years.
【简答题】按光纤中的传导模式数量分类 ,可以将光纤分为哪两类? 和 。