题目内容

The convenience brought __________ mobile payment is obvious.

A. from
B. in
C. by

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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

This may __________ the security of the user's property.

A. endanger
B. dangerous
C. danger