A:甲运出细胞一定有载体蛋白的参与
B:甲进入细胞一定需要能量
C:乙运出细胞一定有载体蛋白的参与
D:乙进入细胞一定不需要能量
下列关于红外线和紫外线的说法不正确的是( )
Snowfall and low temperatures haven't made the animals move hurriedly for shelter. _______, they greet the snow with excitement, either enjoying the snowy landscape or tasting snowflakes.
Jane asked the shop assistant whether ____ ____pay for thee-book by credit card.
青蛙生殖过程中,不具有的是( )