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【判断题】
PGD指在体外对卵细胞、精子及胚胎采用显微操作技术,帮助不孕夫妇受孕的一组方法。( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Certified Cargo Screening Facilities are charged with ___.
A.
randomly selecting about twenty percent of all air cargo, and inspect these shipments before they are loaded on any aircraft
B.
conducting background checks for all airlines and airport employees who are in contact with international cargo air shipments
C.
conducting one-hundred-percent inspections of all shipments that will ually travel on passenger aircraft
D.
reporting on suspicious cargo shipments originating from abroad, through a program called “Automated Targeting System”
参考解析：
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