运维优化对运营现网进行（）的优化，着重于局部地区的故障排除和单站性能的提高。
A.全网性
B.针对性
C.阶段性
参考答案：B
肺动脉收缩早期喷射音可见于
A．瘀点B．充血性皮疹C．瘀斑D．血肿E．小红痣
补全句子。
1. You have to g _____ up at six in the morning.
2. My cousin can't s_____ soap operas.
3. He is medium height with curly and b______ hair.
4. He works in a TV station. He is a r_______.
5. The hotel is n_____ to the bank.
