题干
Is it your house?
—________.
A：Yes, it isn't
B：No, it isn't
C：Very nice
答案(点此获取答案解析）
B
—________.
A：Yes, it isn't
B：No, it isn't
C：Very nice
）轰击Y核生成Z核并放出一个氦核（
），则下面说法正确的是
