下图横轴均表示酶的反应条件，纵轴为酶促反应速率，能正确反映温度和pH与酶促反应速率关系的是
A．甲和乙
B．乙和丙
C．甲和丙
D．都是甲
答案：D
（）用转载机运送材料。
A.可以
B.严禁
The work is not very profitable ______ cash, but I am getting valuable experience from it. A. according to B. on the basis of C. in terms ofD. in the light of
