G蛋白是指
A．鸟苷酸结合蛋白B．蛋白激酶AC．蛋白激酶GD．蛋白激酶CE．钙调蛋白
参考答案：A
The new teacher made a good ____ on the students by her rich knowledge and humorous talk.
A．feeling
B．effect
C．impression
D．expression
偷税是指纳税人用欺骗方法获得国家税收优惠的行为。
