WTJ5122TZJ型钻机空压机皮带轮上使用的是（）。
A、一组联组三角皮带
B、两组联组三角皮带
C、三组联组三角皮带
D、四组联组三角皮带
参考答案：B
---Are you two old acquaintances?
---Yes, we _____ in the same neighborhood for quite a long time, though he went abroad with his family at 14.
A．have lived
B．have been living
C．were living
D．lived
滤过紫外线检查主要用于诊断（）。
A.色素异常性疾病
B.某些皮肤感染
C.血管炎性皮肤病
D.卟啉病
