[填空题]With the rapid adoption of information and communication technology comes the problem of ______, which is global.

[填空题]With the recent rapid advances in information technologies, educational researchers at every level and in every {{U}} (11) {{/U}} have developed new methods, tools, and {{U}} (12) {{/U}} for instruction. As the Internet, email and multimedia have already become parts of most college students’ lives nowadays; {{U}} (13) {{/U}} these new information technologies to engineering and science instruction is a great {{U}} (14) {{/U}} for teachers and researchers. Although the effectiveness and {{U}} (15) {{/U}} of new information technologies on education are not yet well {{U}} (16) {{/U}} and documented the promises and {{U}} (17) {{/U}} they hold for improving education are exciting. For example, {{U}} (18) {{/U}} Students at home and in work places can have access to learning material at any time. {{U}} (19) {{/U}} Students can work on learning materials at their own pace and discuss them with other people when they have questions. In other words, {{U}} (20) {{/U}}.