链传动的效率高达（）
A、0.9～0.91
B、0.95～0.98
C、0.93～0.96
D、0.96～0.99
参考答案：B
造成垄断的原因有哪些
The large, water-spouting statue, called “Merlin” －half lion, half fish－ is the____ of Singapore.
A．symbol
B．sign
C．signal
D．scene
