不同厂、不同期生产的同一品种的雷管可以掺混使用。
参考答案：错
Hardly ______ to the airport ______ he was surrounded by many journalists and fans. [ ]
A. the famous singer had got;" when
B. the famous singer got; then
C. had the famous singer got; when
D. did the famous singer get; then
依恋与日后的发展有何关系？
