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【多选题】
多项选择题 第51-55小题，每小题2分，共10分。下列每题给出的四个选项中，至少有两个选项是符合题目要求的。请在答题卡上将所选项的字母。多选、少选或错选均不得分。 我国《专利法》规定,授予专利权的发明和实用新型应当具备( )。A.
新颖性
B.
创造性
C.
实用性
D.
先进性
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】Consider a linear system whose augmented matrix is of the form which of the following statements hold such that the system will have infinitely many solutions?
A.
a=0,b=0
B.
a=0,b≠0
C.
a≠0,b=0
D.
a≠0,b≠0
【单选题】Consider a linear system whose augmented matrix is of the form which of the following statements hold such that the system must be inconsistent?
A.
a=0,b=0
B.
a=0,b≠0
C.
a≠0,b=0
D.
a≠0,b≠0
【多选题】Consider a linear system whose augmented matrix is of the form ,which of the following statements hold such that the system must have the unique solution?
A.
a=5, b≠4
B.
a=5, b=4
C.
a≠5, b≠4
D.
a≠5, b=4
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