单选题:Foreign students are facing unprecedented delays, as visa ap

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题目内容:
Foreign students are facing unprecedented delays, as visa applications receive closer( )than ever. A.appraisal
B.scanning
C.retention
D.scrutiny
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交感和副交感神经节前纤维释放的递质是(  )A.肾上腺素 B.去甲肾上腺素 C.乙酰胆碱 D.乙酰心碱和去甲肾上腺素 E.肾上腺素和去甲肾上腺素

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