问题
选择题
I ____________ English, but he ____________ Chinese. [ ]
A. speak, speak
B. speaks, speak
C. speak, speaks
答案
答案：C
搜题请搜索小程序“爱下问搜题”
I ____________ English, but he ____________ Chinese. [ ]
A. speak, speak
B. speaks, speak
C. speak, speaks
答案：C
2C(g)+xD(g)，达到平衡时，生成了2molC，经测定D的浓度为0．5mol/L，下列判断正确的是 [ ]