Questions 1-4

What reason does the man give to deny the existence of a living monster in Loch Ness？（）

A．No one has provided an accurate description of the animal.

B．No dead bodies of the animal have ever been found.

C．There are only 500 species living in Loch Ness.

D．The lake is not deep enough for such a huge animal.

测量发电子转子绕组的直流电阻，应在冷状态下进行。测量时绕组表面温度与周围空气温度之差应在±（）℃的范围内。

A.1

B.3

C.5

D.10