A、<span style=";font-family:宋体;font-size:16px">变大；</span></p><p></p>
B、<span style=";font-family:宋体;font-size:16px">变小；</span></p><p></p>
C、<span style=";font-family:宋体;font-size:16px">不变；</span></p><p></p>
D、<span style=";font-family:宋体;font-size:16px">不确定。</span></p><p></p>