皮皮学，免费搜题
登录
搜题
【单选题】
听力原文：M: Hi, Fran, did you attend the regular meeting this morning? What did the manager say about my plane layout of signals? W: Don't worry. The boss was very impressed and he said your layout was right on target. Q: What does the woman imply? (19)A.
The manager was depressed by the man's layout.
B.
The manager thought the man's layout was quite accurate.
C.
The manager thought the man was good at target-shooting.
D.
The manager was impressed by the man's skills in target-shooting.
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】证明，n阶矩阵 的行列式等于(detA)·(detB)．
【简答题】证明：如果A为奇数阶的反对称矩阵，则detA=0．
【简答题】设A是n阶矩阵(n≥2)，求证：detA * =(detA) n-1
【简答题】令A*是n阶矩阵A的伴随矩阵，证明 detA*=(detA) n-1 ． (区别detA≠0和detA=0两种情形． )
【简答题】设A n×n 严格对角占优，则detA≠0．
【简答题】设A为正交矩阵，证明：detA=-1或1．
相关题目：