Local educational authorities have stopped the use of electronic headbands at a primary school in Jinghua, Zhejiang Province.<br />The school used the headbands fixed with devices to detect brain activity to ensure students concentrated during classes.<br />The headbands, according to the manufacturers, are able to measure brain states such as depth of focus, relaxation, and deep thinking.<br />According to the product instructions, teachers and parents can be informed if students are focused on their studies through different colors shown on the headbands.<br />The products have been sold in 15 countries, including the United States, Spain, Mexico, and Brazil.<br />So far, thousands of headbands, each priced 3,499 yuan at its Taobao online shop, have been sold in China.<br />However, the headbands had aroused heated discussions among parents and education professionals.<br />Some parents welcomed the idea, for they thought the headband would help train and monitor their children's good studying habits, and thus help wearers improve their study scores.<br />Hans, a professor of childhood development, said that a person's intellectual capability is determined by the activity of the whole brain.<br />The headband, which only detects part of the brain, is far from enough.<br />Besides, he raised doubts about the accuracy of the data collected, and worried that the devices might pose extra annoyances and burdens to students.<br />Now, listen again, please.<br />Local educational authorities have stopped the use of electronic headbands at a primary school in Jinhua, Zhuziang Province.<br />The school used the headbands, fixed with devices to detect brain activity to ensure students concentrated during classes.<br />The headbands, according to the manufacturers, are able to measure brain states such as depth of focus, relaxation, and deep thinking.<br />According to the product instructions, teachers and parents can be informed if students are focused on their studies through different colors shown on the headbands.<br />The products have been sold in 15 countries, including the United States, Spain, Mexico, and Brazil.<br />So far, thousands of headbands, each priced 3,499 yuan at its Taobao online shop, have been sold in China.<br />However, the headbands had aroused heated discussions among parents and education professionals.<br />Some parents welcomed the idea, for they thought the headband would help train and monitor their children's good studying habits, and thus help wearers improve their study scores.<br />Hans, a professor of childhood development, said that a person's intellectual capability is determined by the activity of the whole brain.<br />The headband, which only detects part of the brain, is far from enough.<br />Besides, he raised doubts about the accuracy of the data collected and worried that the devices might pose extra annoyances and burdens to students.<br />Questions. Why was the use of electronic headbands banned?<br />What is the feature of the headband, according to the manufacturer?<br />What is the main concern of Professor Hans?
（1）
Choose the best answer
A . Most of the electronic headbands sold online had turned out fakes.B . The headband was too expensive for the ordinary household.C . Complaints had been received that the headbands caused headaches.D . There had been a mixed reaction among different parties involved.
（2）
Choose the best answer
A . Its hidden device functions to keep students relaxed.B . It informs teachers and parents of students' study scores.C . It changes color based on the focus level of its wearers.D . It helps determine the wearer's overall intellectual capability.
（3）
Choose the best answer
A . Unauthorized access to students' private data.B . Lack of accuracy of the gathered information.C . The psychological burden upon the family.D . Negative impact on students' physical well-being.
