曲线积分<img src="https://zk.995w.com/lqwvjeImg/62/62b6923563c0379e82b7c577761405e3.png" style="width:125px;height:49px;">,若<img src="https://zk.995w.com/lqwvjeImg/fb/fb5af5b4b7d86a2ef0ac78a48793f07f.png" style="width:15px;height:17px;">为<img src="https://zk.995w.com/lqwvjeImg/1c/1c3e9ff1e0157b892ad337b870322feb.png" style="width:13px;height:15px;">轴与半圆<img src="https://zk.995w.com/lqwvjeImg/03/03eabf447acd4538a1c8b8d7cb3ffcc6.png" style="width:88px;height:28px;">所围正向闭路,则该积分结果为<img src="https://zk.995w.com/lqwvjeImg/c1/c1a90532934f5e499685b2e832de0117.png" style="width:37px;height:41px;">。( )<br>·正确<br>·错误