专用公文指外事部门使用的外事文书、司法部门使用的法律文书、技术部门使用的技术文书。
参考答案:错
根据句意及首字母提示完成单词。
1. We have many r____ at school. For example, we can't eat in the classroom.
2.It's raining. Don't play basketball o____ the room; you’d better stay in the room.
3. W____ your hands before meals. It's good for your health.
4. Be friendly to each other boys. Don't f____ again.
5. Don't run in the h____. It's dangerous.
120型控制阀紧急二段阀跃上试验时,要求制动缸压力上升呈()
A、迅速上升至120~160Kpa,然后缓慢升至400Kpa;
B、迅速上升至400Kpa;
C、缓慢上升至400Kpa;
D、缓慢上升至160Kpa。