根据句意及首字母提示补全单词。

1. —How long has your father been a doctor?

    —F_______ twenty years.

2. —What's your hobby?

    —I like c_______ stamps very much .

3. If you know the answer, please r_______ your hand.

4. "Jim skates well" means he is a good s_______ .

5. Sam has been skating s_______he was six

甲公司有三个事业部，分别从事A、B、C三类家电产品的生产和销售。这些产品的有关市场数据见表4-92和图4-7。在A、B、C三类产品市场上，甲公司的最大竞争对手分别是乙公司、丙公司和丁公司。

在波士顿矩阵中标示出甲公司A、C两类产品的发展策略路线方向。