The DMZ extends about two hundred kilometers ().

Television commercials have been under constant scrutiny for the last few years.A．pressureB．attackC．examinationD．reflection 点击查看答案

According to the passage, which of the following statements is true?A．Students' cheating has deep social roots.B．Students do not cheat on essay tests.C．Reform. in the testing system will eliminate cheating.D．Punishment is an effective method to stop cheating. 点击查看答案