下列血细胞中过氧化物酶染色(POX)阳性反应最强的是() A.嗜中性粒细胞 B.嗜酸

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问题:

下列血细胞中过氧化物酶染色(POX)阳性反应最强的是()

A.嗜中性粒细胞

B.嗜酸性粒细胞

C.嗜碱性粒细胞

D.单核细胞

E.淋巴细胞

考点:临床医学检验临床血液血细胞化学染色的原理和临床意义血细胞化学染色的原理和临床意义题库
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市场经济时期我国城市基层的管理体制是()。

A.单位制

B.街居制

C.社区制

D.单位制和街居制

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下列( )是对多年冻土的正确表述。

A.含有固态水,也可能含有部分液态水

B.冻结状态持续二年或更长时间

C.冻结状态持续一年以上

D.冻结状态持续至少三年

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短文改错

I used to feeling pressured to do well in exams. I was such afraid of falling behind that I kept thinking about studying every minute of the day. The pressure makes me out of breath. To my disappointed, the more worried I was about my studies, the less effective I became. Later, I realized I just took pressure too serious. So I tried taking things easy by taking part in various activity out of class, enjoying music and even daydreaming about fun things.

To my delight, this worked! Gradually,I became more anxious about exams and began to take pleasure in my studies. Pressure cannot avoided. What counts is how to deal with properly, but above all, how to turn it into pleasure or challenge.

题型:单项选择题

NA代表阿伏加德罗常数,下列说法中不正确的是(  )

A.100mL 0.5mol/L的乙酸溶液中,乙酸分子的数目小于0.05NA

B.标准状况下,22.4L水中所含有的分子数为NA

C.O.8 mol乙烷中含4.8NA个氢原子

D.电解氯化铜溶液时,若阴极增重64g,则阳极产生NA个氯气分子

题型:单项选择题

企业或物流系统可以通过降低单位变动成本、降低固定成本、扩大业务量或提高价格等方式来提高安全边际率,降低经营风险。

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