题目

____ tomorrow, our ship will set sail for Macao. A. However the weather is like     B. However is the weather like C. whatever is the weather like   D. Whatever the weather is like   答案：D考查让步状语从句。Whatever引导让步状语从句并作like的宾语，应用陈述语序，表示“无论天气如何”。如图，M为双曲线y＝上的一点，过点Ｍ作ｘ轴、ｙ轴的垂线，分别交直线ｙ＝－ｘ＋m于D、C两点，若直线ｙ＝－ｘ＋m与ｙ轴交于点Ａ，与ｘ轴相交于点B．则AD·BC的值为       ．