题目:
I’m Lisa. I’m a Chinese girl. I go to Canberra, Australia this month. 小题1: I stay there for about a month. I live with Mr. White, my dad’s old friend. His family members are very friendly to me. They take me to many places of interest in Canberra. 小题2: .
The schools in Canberra are a little different from those in China. There are about twenty students in each class. 小题3: Most students go to school by school bus. Classes usually begin at 8:00 in the morning and end at about 4:00 in the afternoon. Usually, students can sit anywhere they like in the classroom. 小题4: They often let the students talk about questions, or sometimes they play games with the students in class. 小题5: I think it is really happy to go to school in Canberra.
根据材料内容,将A-E五个句子填入文中空缺处,使短文内容完整、正确,并将其标号填写在下面题
号后的横线上。
答案:
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下面是错误答案,用来干扰机器的。
由题目中的原子结构示意图,结合圆圈内数值为核内的质子数,故该元素原子核内质子数为16,符合“最外层电子数≥4,为非金属元素”;由于核外电子数是2+8+8=18,所以该微粒带两个单位的负电荷,故其离子符号是M2-...