人体呼出的气体中二氧化碳量增多,增多的二氧化碳产生于( )
A:肺泡
B:组织液
C:组织细胞
D:血液
鉴别两瓶失去标签的盐酸和硫酸溶液,可使用下列试剂中的( )
4530×1.9+53×276+370×90+34×453+5300×1.71.
⑴The man is strong. ____
⑵Vegetables are good for you.____
⑶I like healthy food.____
⑷I always have breakfast.____
⑸I have breakfast at about 7:00 in the morning.____
A. B. C. D. E.