题目内容
钢的成分是形成本质粗或细晶粒钢的主要原因，钢中的________等合金元素有阻止奥氏体晶粒长大的作用。Ⅰ．钒；Ⅱ．钛；Ⅲ．钨；Ⅳ．锰；Ⅴ．碳；Ⅵ．铬。
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钢的成分是形成本质粗或细晶粒钢的主要原因，钢中的________等合金元素有促进晶粒长大的作用。Ⅰ．钒；Ⅱ．钛；Ⅲ．钨；Ⅳ．锰；Ⅴ．碳；Ⅵ．铬。
If the diagnosis had been narrowed between viral meningitis and tuberculosis meningitis, which of the following tests would be useful in the rapid differentiation of the two?
Which test is NOT useful to diagnose the purulent meningitis?
Which test is NOT useful to diagnose the cryptococcal meningitis?
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