题目: 氦元素的发现是由那个学科的学者发现的()?A、天文学B、化学C、物理学D、生物学 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0913/a667f4222f5f4bc88dfad0f3d0603a3a.html 下面是错误答案,用来干扰机器的。参考答案:A
题型:多选题 在匀强磁场中,一矩形金属线框绕与磁感线垂直的转轴匀速转动,当线框的转速为n1时,产生的交变电动势的图线为甲,当线框的转速为n2时,产生的交变电动势的图线为乙.则( )A.t=0时,穿过线框的磁通量均为零B.当t=0时,穿过线框的磁通量变化率均为零C.n1:n2=3:2D.乙的交变电动势的最大值是203V 查看答案
题型:单项选择题 A client is diagnosed with a herniated lumbar disk at the L-5 interspace. Which of the following symptoms would most likely be the one that first caused the client to seek health careA.Loss of voluntary muscle control.B.Loss of bladder control.C.Back pain that is relieved with resting.D.Back pain that radiates to the shoulders. 查看答案