单项选择题

单撑靴式TBM掘进机的掘进循环由( )交替组成

A．掘进和调向
B．掘进和换步
C．掘进和支护
D．支护和换步

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问答题
If the trial balance shows that the ledger is in balance， this means that the individual business transactions were recorded to the appropriate ledger accounts.（）
答案：正确答案：错误
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Why did Newton Minow call American television a "vast wasteland" in 1961?
A、Because radio programs were much better.
B、Because so many programs were mediocre and uninformative.
C、Because there was a lot of educational programming.
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Every business transaction is first recorded in the journal.（）
答案：正确答案：正确
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护理人员排版应遵循的首要原则（） A. 满足病人的需要 B. 有效利用资源 C. 降低人力成本 D. 合理组合人力