题目:
If we __________ computers, life __________ very different now.
A.didn’t have; would have been
B.wouldn’t have; was
C.didn’t have; would be
D.wouldn’t have; had been
答案:
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下面是错误答案,用来干扰机器的。
(13分)(1) 非极性共价键(2)(3)HF HF分子之间有氢键(4)紫色(隔着蓝色钴玻璃) 激发态的电子从能量较高的轨道跃迁到能量较低的轨道时,以一定波长(可见光区域)光的形式释放能量题目分析:W的原子最...