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【多选题】
患者，男性，52岁，57kg，13年前无明显原因感劳累后心悸、气短，因近一个半月症状明显加重，咳嗽、咯白色泡沫痰，不能平卧入院。体检：T37．5℃，RR20次／分，P118次／分，BP95／60mmHg。颈静脉怒张，听诊两中下肺野可湿啰音，心律不齐，心前区舒张期杂音及剑突下收缩期杂音，肝右肋下4cm，双下肢凹陷性水肿。经检查心电图示：异位心律，心室率144次／分，心房纤颤；胸部X平片：双肺淤血，肺动脉主干扩张，右室增大；超声心动图示：二尖瓣增厚、钙化，交界部粘连，开放明显受限，关闭时少量反流。瓣口面积0．8cm 2 ，三尖瓣回声偏强，开放正常关闭欠佳。心导管检查示右房压17mmHg，肺动脉压63mmHg，肺毛细血管楔压23mmHg，心输出量2．2升／分；血气分析pH7．25，PCO 2 35mmHg，PO 2 78mmHg，BE-7．5。关于该患者的病情评估是（）。
A.
心功能Ⅱ～Ⅲ级
B.
心功能Ⅲ～Ⅳ级
C.
ASA评分Ⅲ级
D.
ASA评分Ⅳ级
E.
中度肺动脉高压
F.
重度肺动脉高压
G.
中度二尖瓣狭窄
H.
重度二尖瓣狭窄
I.
右心功能衰竭
J.
左心功能心衰
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举一反三
【多选题】单纯形法的基本步骤是
A.
基变换找新的可行基，通过确定入基变量和出基变量，求得新的基本可行解,直至检验数小于等于0 ，求得最优解为止。
B.
把一般线形规划模型转换成标准型；
C.
确定初始基可行解；
D.
利用检验数对初始基可行解进行最优性检验，若检验数小于等于0？ ，则求得最优解，否则，进行基变换；
查看完整题目与答案
【单选题】I lost my sight when I was four years old by falling off a box car in a freight yard in Atlantic City and landing on my head. Now I am thirty-two. I can vaguely remember the brightness of sunshine and...
A.
makes him believe in life more deeply than the other people.
B.
makes him appreciate the value of the rest of his faculties.
C.
makes him prefer going without his eyes.
D.
strengthens his memory of the color of red.
查看完整题目与答案
【单选题】My car_____when I was on my way home yesterday.
A.
broke up
B.
broke out
C.
broke off
D.
broke down
查看完整题目与答案
【简答题】费用(成本)类账户结构与资产类账户结构相同，收入类账户结构与权益类账户相同。( )
查看完整题目与答案
【判断题】成本类账户结构与损益支出类账户结构完全相同。 （ ）
A.
正确
B.
错误
查看完整题目与答案
【判断题】费用（成本）类账户结构与资产类账户结构相同，收入账户结构与权益类账户相同。 （ ）
A.
正确
B.
错误
查看完整题目与答案
【多选题】单纯形法的具体步骤包括 .
A.
选择进基变量
B.
选择离基变量
C.
旋转运算
D.
终止条件
查看完整题目与答案
【简答题】单纯形法的基本步骤是
查看完整题目与答案
【简答题】I was on my way to the Taiyetos Mountains. The sun was setting when my car         31   (break) down near a remote and poor village. Cursing my misfortune, I was wondering where I was going to spend t...
查看完整题目与答案
【简答题】I lost my sight when I was four years old by falling off a car and landing on my head. Now I am thirty-two. I can vaguely remember the brightness of __36____ and what color red is. It would be ___37__...
查看完整题目与答案
相关题目：
【多选题】单纯形法的基本步骤是
A.
基变换找新的可行基，通过确定入基变量和出基变量，求得新的基本可行解,直至检验数小于等于0 ，求得最优解为止。
B.
把一般线形规划模型转换成标准型；
C.
确定初始基可行解；
D.
利用检验数对初始基可行解进行最优性检验，若检验数小于等于0？ ，则求得最优解，否则，进行基变换；
查看完整题目与答案
【单选题】I lost my sight when I was four years old by falling off a box car in a freight yard in Atlantic City and landing on my head. Now I am thirty-two. I can vaguely remember the brightness of sunshine and...
A.
makes him believe in life more deeply than the other people.
B.
makes him appreciate the value of the rest of his faculties.
C.
makes him prefer going without his eyes.
D.
strengthens his memory of the color of red.
查看完整题目与答案
【单选题】My car_____when I was on my way home yesterday.
A.
broke up
B.
broke out
C.
broke off
D.
broke down
查看完整题目与答案
【简答题】费用(成本)类账户结构与资产类账户结构相同，收入类账户结构与权益类账户相同。( )
查看完整题目与答案
【判断题】成本类账户结构与损益支出类账户结构完全相同。 （ ）
A.
正确
B.
错误
查看完整题目与答案
【判断题】费用（成本）类账户结构与资产类账户结构相同，收入账户结构与权益类账户相同。 （ ）
A.
正确
B.
错误
查看完整题目与答案
【多选题】单纯形法的具体步骤包括 .
A.
选择进基变量
B.
选择离基变量
C.
旋转运算
D.
终止条件
查看完整题目与答案
【简答题】单纯形法的基本步骤是
查看完整题目与答案
【简答题】I was on my way to the Taiyetos Mountains. The sun was setting when my car         31   (break) down near a remote and poor village. Cursing my misfortune, I was wondering where I was going to spend t...
查看完整题目与答案
【简答题】I lost my sight when I was four years old by falling off a car and landing on my head. Now I am thirty-two. I can vaguely remember the brightness of __36____ and what color red is. It would be ___37__...
查看完整题目与答案