A、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>按照平衡条件增大</strong></span>
B、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>保持不变</strong></span>
C、<strong><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">减小</span> </strong>
D、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>不一定</strong></span>