---Students should devote most of their time to studying rather than playing computer games.                                                      

---________.No pains, no gains.

A．Extremely

B．Actually

C．Obviously

D．Exactly

肾小管性蛋白尿和肾小球性蛋白尿区别在于（）

A.前者尿中β₂-MG增高

B.后者尿中β₂-MG增高

C.前者尿中以白蛋白增高为主

D.后者尿中β₂-MG及白蛋白均增高

E.后者尿中β₂-MG及白蛋白均不增高