光学量仪具有测量精度高，适用性能好，测量范围大的特点。 ()
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Which paragraph offers a possible solution for brain drain？
A. Paragraph 1.
B. Paragraph 2.
C. Paragraph 3.
D. Paragraph 4.
对于同种类、同批次、同等级、同货位、同储存条件下的粮食，一般按200吨扦取1份原始样品，混合后以整个货位作为1个检验样品，每个检验样品代表数量一般为()。
A. 1000～2000吨
B. 2000～3000吨
C. 2500～3500吨
D. 3500～4000吨
We learn from the passage that the push factors are related to______.
A. low employment
B. personal choice
C. tax revenue
D. home countries
What was the boys mother best known for in town？
A. Planning good Thanksgiving parties.
Being nice to everyone she knew.
C. Organizing big holiday events.
D. Making the most delicious fried chicken.
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