Which of the following is an example of culture exchange（）
A. the Silk Road International League of Theaters
B. Silk Road International League of Theaters
C. South-South Cooperation Assistance Fund
D. the Silk Road International Arts Festival
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Yunnan is the Top 1 for ______（）
A. industrial export
B. flower export
C. food export
D. automobile export
游标卡尺能测量槽深或桶的深度吗（）
A. 能
B. 不能
用游标卡尺测量,读数时能估读吗（）
A. 不能
B. 能
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