Both Alipay and WeChat are gradually laying ____ the face-scanning payment market.
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The convenience brought __________ mobile payment is obvious.
A. from
B. in
C. by
Biotechnology (生物技术) is gradually being introduced _______ the market.
A. from
B. into
C. by
We must __________ the protection in technology, law, and other aspects
A. stong
B. strength
C. strengthen
Mobile payment often needs to be bound ________ the user's bank card
A. by
B. with
C. in