虹膜主要分上皮细胞层和内皮细胞层。
参考答案:错
The angry teacher the impatient boy who was doing something that had nothing to do with what was being taught.
A.glared at
B.looked into
C.called on
D.watched out
一連の犯行が同一グループによるものであることは、もはや疑う()がない。
A.余裕
B.余分
C.余地
D.余暇