矩阵对应于特征值2的特征向量为()。
A.A
B.B
C.C
D.D
参考答案:D
解析:
The message you intend to convey through words maybe the exact opposite of ___________ others actually understand
A.why
B.that
C.which
D.what
术后合并肺不张最有效的治疗方法是:
A.吸痰
B.蒸汽或雾化吸入
C.口服氯化铵
D.鼓励、协助病人咳痰
E.应用抗生素