“C”是()命令的命令别名
A. COPY
B. CHAMFER
C. SCALE
D. CIRCLE
The country depends heavily on its tourist trade()
A. bases
B. decides
C. lives
D. relies
积分控制作用在最后达到稳定时,偏差是等于()的,这是它的一个显著特点,也是它的一个最主要的优点
A. 0
B. -∞
C. ∞
D. 1
Because they don’t understand English, they communicate entirely by body language when traveling()
A. nearly
B. only
C. completely
D. rarely