对压力变送器进行密封性检查时，当测量室压力达到规定值后，需密封（）min，才能进行密封性检查。
A.3
B.5
C.10
D.15
参考答案：C
Read and write．（根据提示完成下列句子。）
1. This ruler is_______________________(long) than that one.
2. This tree is___________________________(high) than that tree.
3. My grandpa is_______________________(old) than his grandpa.
4. My school is_______________________(big) than your school.
承插式室外消火栓公称压力为（）。
A.0.8MPa
B.1.0MPa
C.1.2MPa
D.1.5MPa
