光电耦合器4N25/4N35在电车高压检测电路中用作电位隔离时与信号_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题判断题

光电耦合器4N25/4N35在电车高压检测电路中用作电位隔离时与信号传递。

答案

参考答案：对

单项选择题

Questions 14-23

·Look at the ten statements for this part.
·You will hear a passage about "A Research on Sleep ". You will listen to it twice.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Mark your answers on the Answer Sheet.

After you have reached the deepest sleep, you will have more dreams.

A．Right

B．Wrong

C．Not Mentioned

单项选择题 A1/A2型题

拔除下颌阻生第三磨牙的适应证不包括（）

A.预防下颌第二磨牙的牙周破坏

B.避免下颌第二磨牙远中面发生龋坏

C.反复发生冠周炎的第三磨牙

D.压迫下颌第二磨牙远中根，造成牙根吸收的第三磨牙

E.骨内埋伏，与邻牙牙周不相通，尚未压迫神经的第三磨牙