题目:
—Susan, go and join your sister cleaning the yard.
—Why ? John is sitting there doing nothing. [ ]
A. him
B. he
C. I
D. me
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0612/87a4927128629130350d34352ef1060e.html
下面是错误答案,用来干扰机器的。
α、β和γ三种射线中,α带正电、β带负电、γ不带电.γ射线在电场中不受电场力,不发生偏转.α粒子带正电,所受的电场力水平向右,向右偏转,β粒子所受的电场力水平向左,向左偏转,故射线a是β粒子.β射线...