THDS预报热轴经转动检查确认可以安全运行的，须（）个探测站。
参考答案：跟踪
鼻骨骨折复位术的常见并发症为________和________。
English is a language shared by several diverse cultures，each of——uses it somewhat differently.
A．which
B．what
C．them
D．those
