乳腺生物反应器主要用于 ( )
A:动物抗病育种
B:增加乳汁分泌量
C:生产药用蛋白
D:治疗乳腺疾病
—Many people eat _______ meat and _______ vegetables than they did before.
—Yes, that's why they're getting fatter and fatter.
读图,根据图中信息回答下题
I have a____.
北美洲的温带海洋性气候不如欧洲广阔,主要原因是( )