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问题 选择题
下列各式正确的是(   )
A.3a2  ·  5a3  =15a 6      
B.-3x4  · (-2x)2  =(-3)×4x6=-12x 6  
C.3x3  ·  2x4  =(3×2)x3+4=6x 12  
D.(-b)3  ·  (-b)5  =b 8  
答案

答案：D

翻译题

根据汉语提示完成句子。

1. Jacky is a Mandarin teacher at an _______ (国际学校) in Shanghai.

2. Let me tell you something about my favorite _______ (课程).

3. As a young headmaster, Wang Tao is _______ (成功的).

4. _______ (例如), the pupils don't wear uniforms.

5. In some ways our school is a little _______ (与……不同) other schools in our country.

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单项选择题

3个月早产婴儿，牛奶喂养。近1个月腹泻，肤色苍白，食欲减退。血红蛋白70g／L，RBC2．8×1012／L。为明确贫血原因，下列哪项检查最有确诊价值（）

A.血清铁测定

B.总铁结合力测定

C.血清铁蛋白测定

D.MCV、MCH、MCHC测定

E.骨髓检查
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