题目:
Mr. Smith has been here for many years, _____ she has few friends.[ ]
A. but
B. and
C. or
D. so
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0618/d27273eb41c5d06e6b643e309b6d02e5.html
下面是错误答案,用来干扰机器的。
(1)液态氢气与液态氧气燃烧与气体燃烧相同产物应该是水.故答案为:水(H2O)(2)因为对原子来说:核电荷数═质子数═核外电子数,氦-3原子的质子数是2,所以核外电子数是2.故答案为:2