Langlang played the piano so -------(精彩) that we all listened carefully

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• Langlang played the piano so -------(精彩) that we all listened carefully
• 选择题:----She played the piano _____than we had thought that evening. ---Sorry she was ______of alA:more successful ;the most successfullyB:more successful; the most successfulC:more successfully ;the most successfulD:more successfully ;the most successfully正确答案是C, D为什么错?题打错了....正确的是----She played the piano _____than we had thought that evening.----So she was ____of all.
• Langlang played the piano so -------(精彩) that we all listened carefully
• 用列举法表示下列集合 方程X3+2x2-3X=0的解集 (X3就是3个X相乘 跟x2一样的)
• 某物由静止开始做加速度为a的匀加速直线运动,运动了t时间后改为做加速度为a’的匀减速直线运动,经过t’时间后停下,则在全部时间内平均速度为at/2.