【单选题】人体受到寒冷或过度紧张刺激时,在神经系统的影响下,机体内相应激素的合成和分泌也会有所变化,下列叙述正确的是()。
A.
寒冷或过度紧张时,下丘脑可合成和分泌促甲状腺激素
B.
当血液中甲状腺激素含量增加到一定程度时,会抑制垂体合成和分泌甲状腺激素
C.
当血液中甲状腺激素含量降低时,对下丘脑和垂体的抑制作用加强
D.
甲状腺活动的调节过程属于反馈调节,这种调节可以使血液中的激素维持相对稳定
【单选题】下列浓度相同的溶液中,pH值最低的是()
【单选题】以下课堂活动的设计不符合翻转课堂理念的是
【单选题】—Do you know who cleaned the blackboard, Tina? —Yes. John ______. [ ]
【单选题】下列浓度相同的溶液中, pH 值最低的是
【单选题】以下课堂活动的设计不符合翻转课堂理念的是
【简答题】情景交际。 Kevin: So, Tina, what 1 did you do? Tina: You won't believe it, but I met Jake Dean! Kevin: Jack Dean, the famous actor? You really 2 him? Tina: Yes! He is 3 movie at the aquarium. Kevin:...
【简答题】情景交际:根据图示及上下文补全对话。 Kevin:So,Tina,what 1 did you do? Tina:You won't believe it,but I met Jack Dean! Kevin:Jack Dean, the famous actor? You really 2 him? Tina:Yes! He is 3 movie. at the aquarium....
【单选题】—Hi, Tina.What did you do _____ your last day off? —I went to the Old People's Home. [ ]
【简答题】What did Vic do whe they met the next morning ?