在相同的温度和压强下，单位体积的氦气与氢气（均视为刚性分子理想气体）的内能之比为：（）
A.1
B.2
C.3/5
D.5/6
参考答案：C
Famous as he is, he still _____ a simple life, riding his motorcycle to do farm work and entertaining
himself with his violin in his spare time. Which of the following is not OK? [ ]
A. leads
B. lives
C. has
D. makes
男性患者，78岁，胆囊切除术后第2天，自觉憋气、痰多、发热、腹痛。查：心率100次／分，心电图无特殊发现，白细胞17×109／L。
为进一步诊断，应做的检查是（）
A.腹平片
B.胸片
C.痰培养
D.心肌酶谱
E.腹穿
