摘要：9．What does the man think of the salesman ? A．Reliable． B．Dishonest． C．Unenthusiastic．
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A semipro baseball league has teams with 21 players each. League rules state that a player must be paid at least ＄15，000，and that the total of all players’ salaries for each team cannot exceed ＄700，000. What is the maximum possible salary，in dollars，for a single player？
A. 270，000 B. 385，000 C. 400，000 D. 430，000 E.700，000
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已知双曲线方程为
-
=1(a＞0，b＞0)，离心率为2，F1、F2分别是它的左、右焦点，A是它的右顶点，过F1作一条斜率为k（k≠0）的直线与双曲线交于两个点M、N，则∠MAN为（ ）
| x2 |
| a2 |
| y2 |
| b2 |
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