不可控相复励自励调压装置是一个（）环的（）系统。
A.闭；前馈
B.闭；负反馈
C.开；前馈
D.开；负反馈
参考答案：B
乖离率是描述股价与股价移动平均线距离远近程度的一个指标，当( )是卖出时机。
A．BIAS(5)＞3.5%
B．BIAS(10)＞5%
C．BIAS(20)＞6%
D．BIAS(60)＞8%
A client who recently had a cerebrovascular accident requires a cane to ambulate. When teaching about cane use, the rationale for holding a cane on the uninvolved side is to（）
A. prevent leaning.
B. distribute weight away from the involved side.
C. maintain stride length.
D. prevent edema.
