20岁的你们在做着什么

A. 加大发射机之间耦合衰减
B. 减小互调转换损耗
C. 加大发射功率

A. it provides cooling as a secondary effect
B. works well on extinguishing electrical fires
C. can be used to combat combustible metal fires
D. All of the above

A. 手太阴肺经
B. 足阳明胃经
C. 足太阴脾经
D. 足少阳胆经