胜利油田标准RTU LINK灯亮，说明Zigbee网络正常。（）

He needs a pen to write _____. [ ]

A. to

B. in

C. with

D. /

下列国家中，经济最发达的是（　　）

A．越南

B．日本

C．印度

D．印度尼西亚

高处作业是指在距基准面（）有可能坠落的高处进行作业。

Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtually disappeared from the United States.

A．surfaced with

B．raised the price of

C．discovered

D．elevated

常用于下颌骨升支外侧密质骨变化情况的X线片是

A．下颌骨尖牙位片

B．下颌骨升支侧位片

C．下颌骨后前位片

D．下颌骨开口后前位片

E．下颌骨升支切线位片