根据上文Studentsoftenhavetomisstheirclassesduetomanyreasons(由于许多原因,学生经常不得不缺课)以及下文Ifyouwanttowriteaperfecte-mailtoyourprofessor,makesurethatyoudon'tmissoutonreadingthefollowingtips.(如果你想给你的教授写一封完美的电子邮件,请确保你没有错过下面的建议)可知,学生缺课请假只要给教授写一封电子...
"Baculoviruses have been known to induce climbing behavior in their caterpillar hosts for over 100 years," the researchers report in today's (Sept 9) issue ofScience. "Until recently, determining the evolutionary basis for these altered behaviors has proven difficult in the absence of a mechanisti...