多长时间无法交付的汇款，应主动办理退汇？
参考答案：
汇入银行对于向收款人发出取款通知，经过2个月无法交付的汇款，应主动办理退汇。
用括号内所给单词的适当形式填空，每空格限填一词。
1. There are many fresh _____ (potato) in the supermarket.
2. Their apartment is on the _____ (seven) floor of the building.
3. The university student came back to his hometown and became a new _____ (village).
4. _____ (lucky), Fred was not hurt in the car accident.
5. Miss Zhou is very popular in our school. She is a _____ ( success) teacher.
下列哪种药物最易引起严重低血糖不良反应（）
A.磺脲类口服降糖药
B.双胍类口服降糖药
C.α-葡萄糖苷酶抑制剂
D.餐时血糖调节剂
E.胰岛素增敏剂
