中 * * 党独立领导武装斗争开始的标志是()
A.北伐战争
B.南昌起义
C.秋收起义
D.红军长征
参考答案:B
He said that his friend ________there three days before, but she was not there_______.
A.had been; now
B.has been; then
C.had been; then
D.was; now
循环流化床锅炉点火稳定后,应及时投入(),并逐步加大达到正常。
A、二次风
B、返料风
C、输煤风
D、拨煤风