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问题 单项选择题

稀释水样测定BOD5时，( )。

A．消耗的溶解氧至少1mg/L，剩余的溶解氧至少1mg/L
B．消耗的溶解氧至少2mg/L，剩余的溶解氧至少1mg/L
C．消耗的溶解氧至少2mg/L，剩余的溶解氧至少2mg/L
D．消耗的溶解氧至少1mg/L，剩余的溶解氧至少2mg/L

答案

参考答案：B

单项选择题

下列哪项胸液检查结果最支持恶性胸腔积液()

A．血性胸液

B．ADA10U/L

C．病理细胞学检查

D．CEA20μg/L

E．蛋白质34g/L
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问答题

Directions:

Jordan is one of your business partners. Recently he was promoted to be the General Manager of ECC Company. Write a letter to

1) congratulate him on his promotion and

2) express your wish to cooperate with him.

You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You don’t have to write the address.
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