智力测试。 ZA to YB is as XC to _____

She ought to stop _____ she has a headache because she _____ too long. [ ]

A. to work, was reading

B. to work, has read

C. working, has read

D. working, read

It is a long time ________ they separated, but it won’t be long ________ they meet again.

A．since, before

B．after, when

C．since, when

D．after, before

在继电保护二次回路，以及在通信复用通道设备上检修及试验工作，不需停用高压设备，只要做安全措施即可保证安全者，应填用变电站（发电厂）第二种工作票。

脊柱骨转移瘤，CT扫描更重要的是可以明确（）

A.有无骨破坏

B.有无软组织肿块

C.有无骨膜反应

D.是否侵犯椎管和硬膜囊

E.有无压缩性骨折

腺样囊性癌预后最差的组织学类型为

A．管状型

B．筛孔型

C．小条索型

D． * * 状型

E．实性型