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【单选题】
过点 P (-2,4)作圆 O : ( x - 2) 2 + ( y - 1) 2 = 25的切线 l ,直线 m : ax - 3 y = 0与直线 l 平行,则直线 l 与 m 间的距离为 ( ) A.4 B.2 C. 5 ( 8 ) D. 5 ( 12 )A.
4
B.
2
C.
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【单选题】—Are these doctors and nurses tired, Mr. Smith? —Yes. ________. They have been operating on the patient for at least 10 hours.
A.
They’re exhausted!
B.
You must be joking!
C.
I’m not surprised!
D.
They are really tired of it!
【简答题】You have been hospitalized for days and have been well attended to by both the doctors and the nurses. You feel that you need to thank them. Write a letter to them to 1. express your thanks; 2. tell t...
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【多选题】双侧大腿严重挤压伤患者转运途中监护要点包括（）
A.
密切观察呼吸、血压、脉搏等生命体征
B.
观察尿量及尿颜色变化
C.
观察受伤肢体的肿胀情况及血液循环状态
D.
伤口出血情况
E.
观察意识状态
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