問題詳情
11. For those isolated at home due to COVID-19 or those who want to save time tomultitask, it is quite convenient for them to use online food ________ system toget their hot meals within about 30 minutes.
(A) production
(B) delivery
(C) vote
(D) presence
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
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