胆固醇不能转变成
A.胆色素B.醛固酮C.雄激素D.雌激素E.维生素D
参考答案:A
阅读对话填空。
Amy: What do you have for lunch on Tuesday?
Server: We have tomatoes, tofu and fish. Here is our school menu.
Amy: That sounds good. What do you have for dinner?
Server: We have potatoes, noodles and green beans.
1. Amy has ___________, ___________ and ___________ for lunch on Tuesday.
2. Amy has ___________, ___________ and green beans for dinner.
(5分)用质量分数为98%、密度为1.84g/cm3的浓硫酸配制100mL1.84mol/L的稀硫酸,若实验仪器有:
A.100mL量筒
B.托盘天平
C.玻璃棒
D.50mL容量瓶E.10mL量筒 F.胶头滴管
G.50mL烧杯 H.100mL容量瓶
实验时应选用仪器的先后顺序是(填入编号): 。