下列人体动态特征中属于习惯性动作的是（）
A.摇头
B.手抖
C.眨眼
D.口吃
参考答案：C
—Would you like to climb mountains with me this Sunday?
—I'd love to. But I _______ play table tennis between Class Three and our class.[ ]
A. am going
B. am going to
C. am
D. going to
在工程设计与计划阶段，初步设计阶段对投资的影响约为（）
A．30%
B．35%
C．40%
D．45%
