case control study和cohort study有什麼不同

Nihongo Study

母国でのユーモアセンスを発揮出来ていますか?日本語の難しいと感じる一つに、数の数え方があります。そして擬音語。これを習得しているだけで、随分役に立つ日本語の数え方をクイズにしました。また日本語での、気の利いた冗談も言える余裕の獲得を目指して下さい。免費玩Nihongo Study APP玩免費免費玩...

Epilepsy Study

The Epilepsy Study Mobile App is free and designed for participants in the current Epilepsy clinical study. The app provides study participants import...

Study Cards

Got lists of new words to learn? Got lots of terms to memorize for each subject? Got stacks of boring index cards? This easy to use free app is for yo...

Study Arabic

This is an app to learn the Arabic language.Update 2.5Some adjustments and correctionsUI change to dashboard view免費玩Study Arabic APP玩免費免費玩Study Arabic...

Study AS3

Requires Adobe AIR.A study guide in the palm of your hands! Use this ActionScript 3.0 study guide to help pass the ACE exam, sharpen your skills, or j...