A.incidentB.questionC.inferenceD.impact
A. incident
B. question
C. inference
D. impact
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设A为n阶实矩阵,AT为A的转置矩阵,则对于线性方程组(I)AX=0和(Ⅱ)ATAx=0必有().
A. (Ⅱ)的解是(I)的解,但(I)的解不是(Ⅱ)的解
B. (Ⅱ)的解是(I)的解,(I)的解也是(Ⅱ)的解
C. (I)的解不是(Ⅱ)的解,(Ⅱ)的解也不是(I)的解
D. (I)的解是(Ⅱ)的解,但(Ⅱ)的解不是(I)的解
张居正主持北方边务的时期,在他的奏请下,出任蓟辽总督的是()
A. 谭纶
B. 戚继光
C. 俞大猷
D. 袁崇焕
听力原文:M: Is Bob angry?
W: If he were, he'd tell me.
Q: What do we know about Bob?
(10)
A. Bob says he is not angry.
Bob says he is angry.
C. Bob is not angry.
D. Bob is angry.
A.IfB.AlthoughC.BecauseD.Supposing
A. If
B. Although
C. Because
D. Supposing