血压较高的患者Tallarida标准分级，应为( )
A．1级B．2级C．3级D．4级E．5级
参考答案：E
解析：[知识点] 不良反应的程度
根据句意和首字母提示填空。
1. What's this in E ?
2. How do you s pencil?
3. Call Jane a 635－2469.
4. Is this y eraser?
5. My b is big. I can put many things in it.
6. Is that your c game in the case?
7. I want to buy two pencil s .
8. A set of k is on your desk.
9. Is your watch in the l and found case?
10. He can't find the word in the d .
某人在一山坡P处观看对面山顶上的一座铁塔，如图所示，塔高BC=80m，塔所在的山高OB=220m，OA=200m，图中所示的山坡可视为直线l，且点P在直线l上，l与水平地面的夹角为α,。试问，此人距水平地面多高时，观看塔的视角∠BPC最大(不计此人的身高)
。试问，此人距水平地面多高时，观看塔的视角∠BPC最大(不计此人的身高)