题目内容

dx=d(4x-3).

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∫(sin2x)′dx=sin2x+C.

A. 对
B. 错

1712A-3choosetheproperresponsetothequestion

A. You’refight
B. It’sgreat.
C. Hereismyear&
D. Howareyou?

1712A-4choosetheproperresponsetothequestion

A. It’sfaraway.
B. Takecare.
C. OnMonday.
D. Sure.

1712A-5choosetheproperresponsetothequestion

A. Yes,please
B. Mindyoursteps.
C. Ok.
D. Tomorrowmorning.