中国人是黑眼睛的,有的外国人是蓝眼睛的,这种眼睛的色素存在于 [ ]
A.角膜
B.虹膜
C.晶状体
D.视网膜
B
The official said they__________ a new law to protect the tourists the next year.
A.makes
B.would make
C.made
D.have made
付款日期可以按照下列哪些形式记载( )
A.见票即付
B.见票后定期付款
C.定日付款
D.出票后定期付款