因为近场区有多个声压为零的点，所以探伤时近场区缺陷往往会漏检。
参考答案：错
改错题。
1. — Must I finish the paper today?
— No, you mustn't. You can finish it tomorrow.
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2. You don't have to get close to the tiger. It's dangerous.
3. He was made work day and night by the boss.
4. We made him the head of our group.
5. The two people have fallen in love with each other for years.
关于道路交通管理的主体表述最准确的是( )。
A．国务院公安部门 B．省公安厅C．县公安局 D．国家授权的各级公安机关交通管理部门
