【判断题】维生素D缺乏时,血钙下降而甲状旁腺不能代偿性增加;当离子钙低于1.75mmol/L~1.88mml/L,可引起神经肌肉兴奋性增高,出现抽搐。()
【单选题】Lucy said she hadn’t heard _____ music before. [ ]
C.
such a beautiful piece of
【单选题】鸡肉的肉制纤维细嫩,含有大量的 ( ),滋味鲜美。
【判断题】国内企业面对外资的超国民待遇只能忍受。()
【判断题】曲面的截痕指的是:该曲面与坐标面的交线,或者该曲面与平行于坐标面的平面的交线.
【单选题】Paper cutting a _________ style of papercutting in China and has been practiced in China since at least the 6th century A.D.