The economic development of Yugoslavia is directly hindered by ______.
A. the competition among its republics
B. the conflicts between the ethnic groups
C. the absence of a large modernized port
D. the existence of four distinct languages
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试管婴儿是
A. 人工授精
B. 配子输卵管内移植
C. 宫腔配子移柏
D. 体外授精与胚泡移植
E. 胚泡移植
患者,男性.36岁,呼吸困难,查体:心尖冲动减弱,心音遥远,有奇脉,该患者最可能是
A. 主动脉瓣关闭不全
B. 心肌病
C. 心包积液
D. 二尖瓣狭窄
E. 肺心病
治疗消化性溃疡推荐单一的晚间给药方案的是( )
A. 组胺H2受体拮抗剂
B. 抗Hp的三联用药
C. 质子泵抑制剂
D. 胃黏膜保护药
E. 抗酸药
In what part of the eye are the rods and cones located
A. Cornea.
B. Lens.
C. Retina.
D. Optic nerv