题干
---Excuse me. Is there a bank near here?
---No, _____. But you can find one on Yangfang Road.
A：there isn't.
B：it isn't
C：they aren't
D：there is
答案(点此获取答案解析）
A
表示一种原子，用 
表示另一种原子，有如图化学反应，则下列说法中错误的是（ ） 