酶促反应进程曲线通常可用于确定()
A．酶反应线性范围
B．适宜的pH
C．适宜的酶量范围
D．反应线性期的时间范围
E．底物的浓度
参考答案：A
For many years, people________ electric cars. However, making them has been more difficult than predicted.
A．dream of
B．had dreamed of
C．dreamed of
D．have dreamed of
怀疑为结核性脑膜炎，可采用
A．抗酸染色
B．墨汁染色
C．煌焦油蓝染色
D．巴氏染色
E．瑞氏染色
