问题
选择题
You really need to go out and get some fresh air and sunshine．You ______ overworked
during the last two weeks．
A．have been
B．were
C．had been
D．would be
答案
A
搜题请搜索小程序“爱下问搜题”
You really need to go out and get some fresh air and sunshine．You ______ overworked during the last two weeks．
A．have been
B．were
C．had been
D．would be
A
＋10Cl-＋16H+====2Mn2+＋5Cl2↑＋8H2O ②2Fe3+＋2I-====2Fe2+＋I2 ③2Fe2+＋Cl2====2Fe3+＋2Cl-。某溶液中含有Cl-和I-，为了氧化I-而不使Cl-被氧化，可选用的氧化剂是