通信线路的带宽是描述通信线路的______。
A．纠错能力
B．物理尺寸
C．互联能力
D．传输能力
参考答案：D
我国目前已推出的基金品种包括是( )。
A．生命周期基金
B．QDII
C．LOF
D．ETF
The Great Wall winds its way from west to east, _______ deserts, _______mountains and ________valleys, until at last it reaches the sea.
A．across; through; over
B．through; on; across
C．across; along; up
D．across; over; through
