[判断题] ph值测量传感器有浸入式、流通式和直接插入式三种形式。
A.正确
B.错误

Text 4
A lot of people believe that television has a harmful effect on children. A few years ago, the same criticisms were made of the cinema. But although child psychologists have spent a great deal of time studying this problem, there is not much evidence that ’television brings about juvenile delinquency.
Few people in the modern world share the views of parents a hundred years ago. In those days, writers for children carefully avoided any reference to sex in their books but had no inhibitions about including scenes of violence. These days children are often brought up to think freely about sex but violence is discouraged. Nevertheless, television companies receive a large number of letters every week complain about programmes with adults themes being shown at times when a few young children may be awake. Strangely enough, the parents who complain about these programmes see no harm in cartoon films for children in which the villain, usually either
A. Children who read ghost stories have bad dreams
B. Almost everyone is secretly afraid of something
C. All adults are afraid of spiders
D. No one is frightened of rats