多种激素共同调节人体生理活动。下列叙述正确的是( )
A：在血糖调节上胰岛素与胰高血糖素两者间表现为协同作用
B：在体温调节上甲状腺激素与肾上腺素两者间表现为拮抗作用
C：在血糖调节上胰高血糖素与肾上腺素两者间表现为拮抗作用
D：在调节生长发育过程中甲状腺激素与生长激素两者间表现为协同作用
________ we deal with our problems, we can easily become unhappy.
完成句子。根据括号内汉语提示，完成句子。(1)It's too dangerous to (游泳)____ alone.(2)Jack is the (高)____ of the five boys.(3)What would you do if your brother borrowed your bike without ____ （允许）.(4)Sandy enjoys reading books and she has been to many (图书馆)____ .(5)Don't forget to check your test paper (仔细)____ before the exam is over.(6)If you stand very close to the Europeans you are talking with,some might feel____ （不自然，不舒服）.
要观察病毒，必须借助的仪器是（ ）
— I must say it is the most delicious duck I have ever eaten. — __________. I'm glad you enjoyed it.
