题目

Cheating(舞弊) is when a person misleads, deceives or acts dishonestly on purpose.  36  . If a basketball team is for kids under 8,it's cheating for a 9-year-old play on the team. At school, in addition to cheating on a test, a kid might cheat by stealing someone else's idea for a science project.  37  .This kind of cheating is called plagiarizing (抄袭). 38   . Jeff is doing it by sneaking（暗中的） answers to a test. And it's also cheating to break the rules of a game or contest or to pretend something is yours when it isn't. When people cheat, it's not fair to other p哺乳动物的生殖活动与光照周期有着密切联系。下图表示了光路信号通过视网膜→松果体途径对雄性动物生殖的调控。（1）光暗信号调节的反射弧中，效应器是_______________，图中去甲肾上腺激素释放的过程中伴随着_______________信号到_______________信号的转变。（2）褪黑素通过影响HPG轴发挥调节作用，该过程属于_______________调节，在HPG轴中，促性激素释放激素（GnRH）运输到_______________，促使其分泌黄体生成素（LH，一种促激素）；LH随血液运输到睾丸，促使其增加雄激素的合成和分泌。（3）若给正常雄性哺乳动物个体静脉注射一定剂量的LH,随后其血液中GnRH水平会_______________,原因是____________________________________________________________。