连续点燃多根导火索时,必须先点信号炮,信号炮导火索长要不得超过该次被点炮眼中最短导火索长度的()。
A.1/5
B.1/4
C.1/3
D.1/2
参考答案:C
王先生,40岁,因出血呈休克,经扩容疗法后血压和中心静脉压在正常范围内,但尿18ml/h,尿比重1.010,应提示( )
A.血容量仍不足 B.急性肾衰 C.急性心衰D.急性肺衰 E.抗利尿激素分泌过多
根据短文内容填空
The old man is already sixty years old. But he has only fifteen birthdays. How is it? When is his birthday?
Keys: His birthday is on February 29th. It's a leap(闰年) year every four years. So he has only fifteen birthdays.
1. The old man is __________ years old.
2. He has only __________ birthdays.
3. His birthday is on __________.
4. A leap year happens(发生) every __________ years.