导爆索起爆方法在露天矿爆破时比导爆管起爆网路噪音（）。
A.大
B.小
C.一样
D.无法比较
参考答案：B
△ABC是等边三角形，点O是三条中线的交点，若△ABC以O为旋转中心，旋转后能与原来的图形重合，则△ABC旋转的最小角度为______度．
Do you think that bridge ____ 2,000 meters long? It doesn’t seem ____ long.
A．measures, that
B．is measured, so
C．is measured, such
D．measures, much
