【判断题】入射光的波长是影响摩尔吸收系数的因素之一。
【判断题】绘制零件草图时,零件上的倒角、凸台等细小结构可忽略
【单选题】What is Mary's problem of living in a family house?
A.
She dislikes the food she eats.
B.
She is unable to sleep well.
C.
She finds the rent high.
D.
She has no chance to make friends.
【简答题】阅读短文选择正确答案。 My name is Tom. I have a new friend. My friend is a girl. Her name is Mary. She is thin. She has long hair, big eyes and ears. She has a small nose and a small mouth She is cute. 1. Tom ha...
【多选题】a图中,U的数值为 V,电阻上的电流为 A,方向 (向上/向下); b图中,U的数值为 V,电阻上的电流为 A,方向 (向上/向下);
【单选题】仪表美通过人的访谈举止、待人接物以及社交能力展现出来,对仪表美的要求不正确的是 ( ) 。
【简答题】若V为复线性空间,τ为V上的线性变换,且0≠u∈V,<τ(u),u>=0,则τ=0(零变换). 若V为实线性空间,τ为V上线性变换,若u∈V,<τ(u),u>=0则τ=0?