发动机活塞在汽缸内由上止点运动到下止点的过程称为（）。
A、活塞行程
B、工作冲程
C、汽缸工作容积
D、发动机排量
参考答案：B
根据句意和汉语提示写出单词。
1. We often have some__________ (活动) after schoo1.
2. We are__________ (放松的) on weekends.
3. __________ (粥) is popular for breakfast in China.
4. I want a__________ (棕色的) sweater, please.
5. Is there__________ (任何事) new in today's newspaper?
6. Please__________ (讨论) this question with your classmates.
7. Do you like soup operas or __________ (情景) comedies?
8. We cannot speak __________ (大声地) in the reading room.
“主月经”的经络是
A．任脉B．督脉C．冲脉D．肾脉E．肝脉
