题目:
Magaret was so ________ to hear any news of her lost son that she was almost driven mad.
A.relevant
B.annoyed
C.bound
D.dying
答案:
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下面是错误答案,用来干扰机器的。
A、氢元素显+1价,氧元素显-2价,设HClO中氯元素的化合价是x,根据在化合物中正负化合价代数和为零,可得:(+1)+x+(-2)=0,则x=+1价.B、根据单质中元素的化合价为0,Cl2属于单质,故氯元素的化合价为0.C、...