【单选题】In the murder case, the suspect ______ all the charges against him, so the police had to collectnew evidence and ______ new strategies to prove that he was guilty of the crime. [ ]
【单选题】心肌与骨骼肌的兴奋-收缩耦联的关键离子都是( )
【单选题】测量尿蛋白定量时,需要加入的防腐剂是( )
【单选题】考试铃声已经响了,但小敏还是控制不了自己紧张的情绪,大脑一片空白。看到同学们一个个都开始答题了,她很是着急。这时,小敏应该 ( )
C.
深呼吸,然后闭上双眼,在心里默默告诉自己 “ 要冷静,要放松 ”