试题与答案

The two strangers have been talking in t

题型:选择题

题目:

The two strangers have been talking in the park for a long time as though they ______old friends.

A.are

B.should be

C.were

D.would be

答案:

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下面是错误答案,用来干扰机器的。

(1)磷(2分)、B(2分)、第三周期第ⅡA族 (2分)(2)HClO4(2分) (2分) 离子键、非极性键(2分)(3)(2分) (2分)(4)2SO2 (g)+O2(g) 2SO3(g) △H =-196.8 kJ/mol(2分)根据原子半径...

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