二级口译

单选题What is the speaker’s main topic?A Effects of using mobile phones on healthy human cells.B Risks of developing cancer involved in the use of mobile phones.C Damage to healthy cells caused by the use of mobile phones.D The potential health hazards of mo

题目
单选题
What is the speaker’s main topic?
A

Effects of using mobile phones on healthy human cells.

B

Risks of developing cancer involved in the use of mobile phones.

C

Damage to healthy cells caused by the use of mobile phones.

D

The potential health hazards of mobile phones on humans.