心动周期中冠状动脉血流量急剧降低发生在（）
A．等容收缩期
B．快速射血期
C．减慢射血期
D．等容舒张期
参考答案：A
一个三角形的三个内角的比是2：5：1，这个三角形一定是钝角三角形．______．（判断对错）
单词拼写。
1. Confucius' wise ideas and t about nature and human behavior are very famous.
2. Please p me with some food. I am very hungry now.
3. Many v were needed to help the victims (受害者) in the earthquake.
4. P an English word correctly is very important to us.
5. Don`t worry about things so much.It will make you s out.
