呕吐伴上腹部节律性、周期性痛可见于（）。 A.肠钩虫病 B.肝硬化伴食管胃底静脉曲张

引起急性胆囊炎的常见病因是（）。

A.胆道蛔虫进入胆囊

B.胆囊息肉继发感染

C.胆囊结石堵塞胆囊管

D.胰腺炎致胰液反流

E.胆总管下端梗阻

“PZ220 40”的灯泡接在220伏的电路上工作______小时消耗1度电，改接在110伏的电路是，功率为______瓦，额定功率为______瓦．

请问GTP隧道标识（TID）由哪两部分组成：（）

A、IMSI+NSAPI

B、TLLI+NSAPI

C、TLLI+IMSI

D.PTMSI+NSAPI

An analyst does research about financial lease. Which of the following lease provisions least likely leads to a finance lease（）

A. The title to the leased asset is transferred to the leasee at the end of the lease.

B. The present value of the minimum lease payments is substantially less than the asset's fair value.

C. The lease term is equal to the asset's economic life.

A．K_P=∞

B．K_V=∞

C．K_V=0.5

D．K_a=0