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
和 
两种不同的空间异构体．下列各物质中，能形成类似上述两种空间异构体的是（ ）