【单选题】放学了,可今天轮到小明的小组打扫卫生,因为想着要看“世界杯”足球赛,于是随便扫了一下地,把垃圾堆在一边就走了。对于小明的行为,你认为()
A.
为了看向往已久的“世界杯”足球赛,而没倒垃圾这是情理之中的事
B.
不倒垃圾是错误的,我们生活在集体中,就应对集体负责
【单选题】I’m really feeling _____ . I wish I had never said such stupid things in the presence of my friend.
【单选题】I'm really feeling ______. I wish I had never seen such stupid things in the presence of my friend.
【单选题】I’m really feeling _____ I wish I had never said such stupid things in the presence of my friend.
【简答题】I'm really feeling _____. I wish I had never said such stupid things in the presence of my friend.
【简答题】三相异步电动机常用的调速方法有变极调速、变频调速和变转差率调速,其中()的调速性能最好。
【简答题】三相异步电动机常用的调速方法有: 、 、和 三种。
【单选题】时间数列中,各个指标数值可以相加的是( )。
【单选题】时间数列中,各个指标数值可以相加的是( )