A:knew of
B:became aware of
C:reflected
D:aware for
科学家把人胰岛素基因导入大肠杆菌,得到了能生产人胰岛素的“工程菌”,这种方法属于( )
有关旅游活动中的环境问题的叙述,正确的是( )
A: What do we have for breakfast?
B: We have some ____, some ____ and some juice.