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制备供流式细胞术分析的样品，其浓度应为

A. 102-103个/ml
B. 103-105个/ml
C. 105-107个/ml
D. 107-108个/ml
E. >108个/ml

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Suppose your friend Zhang Wei asks you to recommend him for a job position in your company. Write an email to the HR of your company to 1)state how well you know your friend, and 2)describe the professional qualifications of the candidate. You should write about 100 words on the ANSWER SHEET. Do not use your own name. Use "Li Ming" instead. Do not write your address.(10 points)

The practice time accounts for lower percent in academical performance partly because______.

A. the new paper makes the most comprehensive review
B. the new paper includes 88 studies across a wide range of skills
C. it"s difficult to predict the effect of the practice time
D. it" s difficult to evaluate the effect of existing knowledge

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The paper published in Psychological Science introduces______.

A. why the debate swings back and forth for a long time
B. what the current situation of the discussion is
C. where the people who just want to do their best are standing
D. what the significance of the debate is

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What is the passage mainly about？

A. Economists" opinions on the decline of Europe.
B. Narrowing innovation: responsible for the decline of Europe.
C. The development trend of European countries.
D. The troubles of European countries.

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制备供流式细胞术分析的样品，其浓度应为

A. 102-103个/ml B. 103-105个/ml C. 105-107个/ml D. 107-108个/ml E. >108个/ml

The practice time accounts for lower percent in academical performance partly because______.

The paper published in Psychological Science introduces______.

What is the passage mainly about？

A. 102-103个/ml
B. 103-105个/ml
C. 105-107个/ml
D. 107-108个/ml
E. >108个/ml