【单选题】He has a _______ of a perfect life that is free of worry and pain. But as the years pass, he is almost sure he has no chance of success.
【简答题】There is no to worry. He is old enough to take care himself. A, difference B, need C, possibility D, sense
【单选题】CAD绘图中,若要在标注文字时插入“±”符号,则应输入的字符是( )。
【简答题】下列属于禁忌灌肠的患者是_____。 A: 妊娠 B: 急腹症 C: 严重心血管疾病 D: 消化道出血