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【简答题】
Listen to an announcement twice and during the second listening, put back the missing words in the blanks. Ladies and gentlemen, the captain has turned on the Fasten Seat Belt sign. Please take your 1 ___________ and fasten your seat belt. At this time, we request that all cell phones be turned off for the 2 ______ duration of the flight. We request that all other 3 ___________ devices be turned off until we fly above 10,000 feet. We will notify you when it is 4 _____ to use such devices. We 5 ______ you that this is a non-smoking flight. Smoking is not 6 ______ on the entire aircraft, including the lavatories. If you have any 7 _______ during our flight today, please don’t 8 _______ to ask one of our flight attendants. Thank you.
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皮皮学刷刷变学霸
举一反三
【单选题】下述哪种表现最有利于鉴别支气管哮喘和心源性哮喘（）
A.
肺部干啰音为主兼有少量湿啰音
B.
心率快偶有早搏
C.
呼吸性呼吸困难为主
D.
心脏增大伴心尖部S3
E.
静注氨茶碱有效
【单选题】6-23、设P:飞机准点起飞,Q:飞机晚点起飞。命题“飞机或准点或晚点起飞”的符号化表示为______________。
A.
P∧ Q
B.
(P∧￢ Q)∨ (￢ P∧ Q)
C.
P or Q
D.
P∨ Q
【单选题】求函数的极限 可以用下面那组语句完成 ?
A.
syms x y=asin(x)/x limit(y,x,0)
B.
syms x y=arcsin(x)/x limit(y,x,0)
C.
limit(＇asin(x)/x＇，＇x’,0)
D.
limit(asin(x)/x,x,0)
【简答题】每 给三点组合排水。
【单选题】下述哪种表现最有利于鉴别支气管哮喘和心源性哮喘
A.
肺部干罗音为主兼有少量湿罗音
B.
心率快偶有早搏
C.
呼吸性呼吸困难为主
D.
心脏增大伴心尖部S3
E.
静注氨茶碱有效
【单选题】求函数 在附加条件 下的极值,下面正确的是:
A.
在点(1,1)处取得极小值2
B.
在点(1,-1)处取得极小值2
C.
在点(1,1)处取得极大值2
D.
在点(1,-1)处取得极大值2
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