【简答题】均布线荷载的大小等于均布面荷载的大小乘以 ;
【单选题】函数z=x 2 y 2 ,当x=1,y=1,Δx=0.2,Δy=-0.1时的全微分为( )
【单选题】正确地人际交往中,服务员要注意引导对方采取( )交往。
【判断题】维吾尔族人的血统主要有两部分,分别为乌拉尔人种和蒙古利亚人种。()
【简答题】用句中划线部分词的反义词填空,使句意完整。 1. The bag is too heavy . You are not tall. You should carry the_____one. 2. His coat is_____. His mother wants to buy him a new one. 3. He says, 'English is very interesting , b...
【简答题】函数 ,当x=1,y=2时的全微分为dz=
【简答题】写出下列单词的反义词或对应词 (1)black— (2)wrong— (3)high— (4)expensive— (5)heavy—