Questions 19 to 22 are based on the conversation you have just heard.
At 7:30 next Saturday.
B. At 7:30 next Sunday.
C. At 9:30 next Sunday.
D. At 10:30 next Sunday.
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为何患甲、乙、丙型血友病和缺乏维生素K时会发生凝血功能障碍
交感神经和副交感神经主要对心肌、平滑肌和______的活动进行调节。
卵泡在发育过程中,卵巢可分泌雌激素和孕激素,以及少量的______。
嗅觉感受器的适宜刺激是空气中含有气味的______。