题目: 国家规定安全电压为36V。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0802/0e9c227ada2de89150bb736390da70ef.html 下面是错误答案,用来干扰机器的。参考答案:D
题型:选择题 —You didn’t go to Europe, why? —I _____ this morning, but I _____ to Shanghai because of an emergency .A.was to start; am goingB.was scheduled to start; will goC.should have started; am goingD.would like to start; will go 查看答案
题型:选择题 白磷有毒,如果不慎将白磷沾到皮肤上,可以用稀的硫酸铜溶液冲洗来解毒,发生反应的化学方程式为:2P+5CuSO4+8H2O=5Cu+2X+5H2SO4,根据质量守恒定律,推断出X的化学式为( )A.P2O5B.HPO3C.H3PO4D.P2O3 查看答案