与if成对的是_______，与do case成对的是________if的否则是________，do case 的否则是_________
举一反三
- 下面多重分支程序段中的错误是(). DO CASE CASE .T. DO CASE CASE .T. …
- In case of emergency, do not keep anything in the seat-pocket.
- In case of emergency, do not keep anything in the seat-pocket.
- In case of emergency, do not keep anything in the seat-pocket.
- For __________ (secure) sake, do not use the lift in the case of fire.