【单选题】以下属于永续年金的特点的是
B.
一定时期内无款项收支,从中间某时点开始收付的年金形式
【单选题】_____ he learns English well is of great importance to his future life..
【单选题】English is of great __________ in the modern world.
【简答题】二端口网络的输入阻抗Z i 与基本参数中的Z 11 、H 11 有何区别?
【简答题】English is of great ____ (important) in the modern world.
【单选题】Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only with...
【单选题】Her poor health limits her earning ( )能力,才能