【单选题】留取24小时尿标本做17—羟类固醇检查,加入浓盐酸的主要目的是:
【简答题】截止至2019年3月底,被誉为“____”的中欧班列已累计开行超过1.4万列。
【判断题】治疗消化性溃疡时,由于要清除幽门螺杆菌和抑制胃酸分泌,所以一般需要枸橼酸铋钾与四环素、奥美拉唑同时服用效果最佳。
【判断题】为了避免从动件运动失真,平底从动件凸轮轮廓不能内凹。
【判断题】为了避免从动件运动失真,平底从动件凸轮轮廓不能内凹。
【单选题】Which of the following statements is NOT true?
A.
Aid workers were kidnapped from a refugee camp.
B.
One of aid workers may be injured.
C.
An extremist group has claimed responsibility.
D.
There is no demand for payment from the kidnappers.
【单选题】Relief work and selfless ______ aid continues, which helps deliver needed equipment to the disaster area.
【简答题】电动汽车电机驱动系统包含高压动力电池、( )和驱动电机。