If I were not able to live with one who I love, I_____ happy, even if I _____ the Heaven Emperor.
A. will not be, were
B. wouldn't be, were
C. will not be, am
D. wouldn't be, am
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用于车辆单个车轮或局部举升,其主要特点有:
A. 体积小
B. 重量轻
C. 可移动
D. 举升能力强
设G = (V, E)和H = (W, F)是图, 若W是V的子集且F是E子集, 则称H = (W, F)是G = (V, E)的____。
若H = (W, F)是G = (V, E)的子图且W = V, 则称H = (W, F)是G = (V, E)的____。
设W是V子集,则以W为节点集合,以两端点均属于W的所有边为边集合构成的子图,称为____。