Lillie硫酸亚铁染色法常用于观察（）。
A.胆色素
B.黏多糖
C.黑色素
D.肌肉
E.纤维
参考答案：C
— The head teacher said we had only three days to finish the project.
— Don't worry. We have already ________ two thirds of it. [ ]
A. taken over
B. got through
C. made up
D. given away
压力传感器提供（）信号和X容积室压力信号，并反馈到BCE。
