A.-9:4:-36 | B.9:4:36 | C.-3:2:-6 | D.3:2:6 |
A.增大 | B.先增大后减小 |
C.保持不变 | D.减小 |
A.QA=25×10-3c QB =—4×10-3c QC =—9×10-3c |
B.QA =36×10-3c QB =—4×10-3c QC =9×10-3c |
C.QA =4×10-3c QB =—5×10-3c QC =1×10-3c |
D.QA =16×10-3c QB =—2×10-3c QC =24×10-3c |
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