题目:
—I hear your journey was not very pleasant.
—But for the sudden rain we _______ a wonderful time.
A.will have
B.should have
C.should have had
D.had
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:因为88-2-8-8-18-18-32=2,所以根据元素周期表的结构可知,该元素应该位于第七周期第ⅡA族。同主族自上而下金属性逐渐增强,最高价氧化物的水化物的碱性逐渐增强,所以选项C正确,其余选...