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【简答题】
当λ取，线性方程组 有非零解？在有非零求出它的通解.
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反馈参考答案：
举一反三
【单选题】He ____to go to Beijing today, but he postponed the trip when he heard that there would be a downpour at noon.
A.
was intending
B.
would intend
C.
had intended
D.
intended
【单选题】He looked dismayed when he heard the news.
A.
pale
B.
hurtful
C.
doubtful
D.
disappointed
【单选题】下列关于胰液的叙述，错误的是
A.
胰液是弱酸性液体
B.
成人每日分泌量为1～2L
C.
胰液中含量最多的成分是水
D.
胰液中含有HCO3-
E.
胰液中的酶能消化脂肪
【单选题】He was so ____ _when he heard the ____ ___ news that he got the first prize in the contest.
A.
exciting, exciting
B.
exciting, excited
C.
excited, excited
D.
excited, exciting
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