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【单选题】
一减速齿轮传动,主动轮 1 用 45 钢调质,从动轮 2 用 45 钢正火,则它们齿面接触应力的关系是 。A.
σ H1 < σ H2
B.
σ H1 = σ H2
C.
σ H1 > σ H2
D.
可能相等，也可能不等
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【单选题】女,60岁。腹痛、腹胀伴恶心、呕吐,肛门排气排便停止24小时。考虑为肠梗阻,非手术治疗最重要的措施是
A.
禁食、胃肠减压
B.
抗感染
C.
取半坐卧位
D.
缓解腹痛、腹胀
E.
纠正电解质酸碱失衡
【单选题】女,60岁。腹痛、腹胀伴恶心、呕吐,肛门排气排便停止24小时。考虑为肠梗阻,非术手治疗最重要的措施是
A.
禁食、胃肠减压
B.
抗感染
C.
取半坐卧位
D.
缓解腹痛、腹胀
E.
纠正电解质酸碱失衡
【简答题】听下面一段材料，回答第1至3题。 1. What can you learn from the conversation? [ ] A. The man has got a well-paid job. B. The man is busy looking for a job. C. The man has found a job in the restaurant. 2. What wi...
【简答题】A．The man was fined. B．The man got a ticket to the cinema. C．The man has a poor eyesight. D．The woman wanted to know where the man got his ticket.
【简答题】A．The man will get repaid. B．The man has got an apology from the clerk. C．His money will be returned upon demand. D．It's hard for the man to ask for his money back.
【简答题】A．There's an opening in the company. B．The man has got some working experience. C．The man can start his job this week. D．The man is majoring in management.
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