光子的平均寿命与损耗的关系如何?
参考答案:
光子的平均寿命定义为腔内光强衰减为初始值的1/e时所需要的时间。t=L/δC,腔内损耗δ越大,则t越小,腔内光强衰减越快。
Students must be strict ____ their studies and teachers should be strict _____ their students.
A.in, at
B.at, with
C.with , in
D.in, with
承包单位以欺骗手段获取资质证书的,( );构成犯罪的,依法追究刑事责任。
A.予以取缔,处以罚款
B.吊销资质证书
C.吊销资质证书,处以罚款
D.处以罚款