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【简答题】
判断下列说法是否正确，为什么? (1)如线性规划的原问题存在可行解，则其对偶问题也一定存在可行解; (2)如线性规划的对偶问题无可行解，则原问题也一定无可行解; (3)如果线性规划的原问题和对偶问题都具有可行解，则该线性规划问题一定具有有限最优解。
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皮皮学刷刷变学霸
举一反三
【简答题】This year witnessed rapid growth of exports and continuing fall of imports.
【单选题】活化部分凝血酶原时间(APTT)测定是
A.
内源性凝血系统最常用的筛选试验
B.
外源性凝血系统最常用的筛选试验
C.
纤溶内激活途径最常用的筛选试验
D.
纤溶外激活途径最常用的筛选试验
E.
纤溶外源激活途径最常用的筛选试验
【单选题】What is true about the symptoms of the corona virus?
A.
It will cause some pretty unusual symptoms.
B.
It usually makes people cough and have fever.
C.
It is so severe that all the sick people will stay in hospitals.
【单选题】A ( ) for the second half of the year is to analyze the reasons for the rapid growth in loans and the associated risks.下半年的一个优先考虑的重点是分析贷款迅速增长的原因及其相关风险。
A.
prior
B.
prefer
C.
priority
D.
point
【多选题】What can you learn about the corona virus from the video?
A.
It passes sickness from person to person.
B.
People will feel sick with coughing, sneezing.
C.
Maybe it's a kind of contagion(传染病) caused by bats.
D.
We can't stop the creeping (蔓延的) virus even if we fight it together.
【简答题】______ (没有几个其他国家) are undergoing such rapid growth.
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