客户网银证书如需在有效期满后继续使用，应在证书有效期满前（）天内在网上自助或营业网点进行证书更新。
A.10
B.12
C.14
D.15
参考答案：D
—I'd like to buy myself a drink. Could you tell me _______ to park my car?
—Sure. You can park it in the corner.[ ]
A. how
B. when
C. where
D. what
数字卫星电视系统中，视频信号的编码通常采用（）。
