—When did Yao Ming enter the NBA?—Well, he ________ a chance to play for an NBA

—When did Yao Ming enter the NBA?—Well, he ________ a chance to play for an NBA team in 2002, after

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—Mr. Wang, I didn’t see you this morning. Where did you go?—Oh, I ________ to gi

—Mr. Wang, I didn’t see you this morning. Where did you go?—Oh, I ________ to give a speech.

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—The meeting room is very tidy.—Yes. It ________ every day.

—The meeting room is very tidy.—Yes. It ________ every day.

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在四边形 ABCD 中(如图 1 所示), AB=AD, ∠ABD=45° , BC=BD=CD=2, 将四边形 ABCD 沿对角线 BD 折成四面体 ABCD

在四边形 ABCD 中(如图 1 所示), AB=AD, ∠ABD=45° , BC=BD=CD=2, 将四边形 ABCD 沿对角线 BD 折成四面体 ABCD(如图 2 所示), 使得∠ABC=90

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设函数 f(x) 在 R 上存在导函数 f(x), f(x) 的图象在点 M(1, f(1)) 处的切线方程为y=1/2x+ 2, 那么 f(1) +f(1)

设函数 f(x) 在 R 上存在导函数 f(x), f(x) 的图象在点 M(1, f(1)) 处的切线方程为y=1/2x+ 2, 那么 f(1) +f(1) =()

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