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问题 单项选择题

男性，28岁，贫血3年，伴有下肢慢性溃疡；化验为正细胞贫血，血清铁460μg/L，总铁结合力210μg/L，骨髓贮存铁(++)应诊断为

A．再生障碍性贫血

B．慢性感染性贫血

C．营养性巨幼红细胞性贫血

D．缺铁性贫血

E．铁幼粒细胞性贫血

答案

参考答案：B

阅读理解

阅读理解。

1. What does 2045 mean? It means           . [ ]

A. eight forty-five

B. eight forty-five in the morning

C. a quarter past eight in the evening

D. a quarter to nine in the evening

2. What is the flight number from Beijing to Abu Dhabi? [ ]

A. F002, F004 and F012.

B. F002, F008 and F012.

C. F002, F008, and F018

D. F012, F016 and F022

3. How long does it take to fly from Beijing to Doha? [ ]

A. Nine and a half hours.

B. Nineteen hours and a half.

C. Seven hours and a half.

D. Six hours and a quarter.

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单项选择题

金属烤瓷材料与金屑的匹配形式中错误的是

A．烤瓷与金属的结合界面必须保持干燥

B．热胀系数在金瓷匹配的影响因素畔占主要地位

C．烤瓷的热胀系数均稍小于金属的热胀系数

D．烤瓷材料的烧结温度应低于金属的熔点

E．为获得烤瓷与金属的良好结合，可在烤瓷中加入氧化锡
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