心室易损期位于__________________;相当于心室的__________________。
参考答案:T波顶峰前20~30ms、相对不应期
根据下列图片完成下列句子。
1. This is my father. He is a .
2. — is she? —She is a .
3. —What would you like lunch? —I'd like some and fish.
4. — is your father? —He is in the .
5. —What can you see? —I can see a .
计算题:某电厂锅炉额定负荷670t//h下的排烟损失q2=6.14%,排烟不完全燃烧热损失q4=1.7%,化学不完全燃烧热损失q3=0.5%,散热损失q5=0.3%,灰渣物理热损失q6=0.2%,试用反平衡法计算锅炉热效率。