对于23G互操作中由于切换导致掉话的原因分析正确的是（）
A.系统间定时设置不合理，导致终端系统间切换未完，RNC发起释放。重点检查PS系统间切换定时器（一般大于20S），RLC不可恢复性错误出现的时长，RL失败的释放时间这三项
B.物理信道重配置时发生最优小区发生变更导致掉话，需要算法进行优化
C.2G邻区配置错误，例如：在邻区中配置了两个同BISC2G邻区，可以通过检查数据解决
D.邻区漏配置，可以通过配置邻区解决
参考答案：A, B, C, D
| Cloze test. 完形填空。 |
| Ann is l English girl. She is fourteen. She is a 2 student. Her teacher is Miss White. Ann is helping her to put 3 books and ruler on the desk. They have a new 4 . You can 5 40 desks and chairs in it. A blackboard, a clock and a map are 6 the wall. There are some pens on the desks. The red 7 is Ann's. Others (其他的) are Kate's. Kate is Ann's 8 friend. She isn't 9 here today. She is ill. Look at the clock. It's about four o'clock. It's time 10 and play games. |
| ( ) l. A. a ( ) 2. A. middle school ( ) 3. A. my ( ) 4. A. room ( ) 5. A. look ( ) 6. A. on ( ) 7. A. pens ( ) 8. A. fine ( ) 9. A. / ( ) 10. A. come | B. an B. Middle School B. your B. class B. look at B. in B. pencil B. good B. at B. go | C. the C. middle school's C. his C. grade C. see C. at C. one C. nice C. on C. to come | D. / D. Middle School's D. her D. classroom D. see at D. to D. ones D. right D. of D. to go |