醇沉操作时应注意的问题不包括
A．药液浓度
B．沉淀洗涤
C．药液温度
D．醇沉浓度
E．醇沉容器
参考答案：E
—What's the low-carbon (低碳的) lifestyle like?
—Save ________ energy, produce ________ carbon.
[ ]
A. more; more
B. less; more
C. less; less
D. more; less
检修设备停电应该如何操作？
