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上一题下一题 0.0难度选择题更新时间:2018-03-24 01:13:08

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若函数f（x）=cos2x+asinx在区间（

\frac{π}{6}

\frac{π}{2}

）是减函数，则a的取值范围是____．

同类题2

A student in Fudan University was killed by his roommate just because of small things in daily life. It is important for students to learn how to _________ each other.

同类题3

阅读下面短文，从短文后所给的A、B、C、D四个选项中选出最佳选项。

Driver Wanted

Drive for busy restaurant some evening and weekend work.

All meals are free.

Ring 33335678.

House for Sale

￥150, 000, built in 1995.

The house with 3 bedrooms, a bathroom, a living room, a kitchen and a breakfast room. It's on the south side of the city.

Yingbin Supermarket, the biggest shopping centre in our city will open on April 8, 2016. Everybody with today's Shenzhen Daily will get a small present that day. You are welcome.

Tel: 27984321

Add: No.6 Yinghua Road

Shenzhen Daily April 1, 2016

Rose's Special Concert

Time: 2 p.m., July 3, Saturday

Place: People's Stadium

Ticket Price: RMB: 150 yuan for adults; 70 yuan for students

同类题4

足够长的水平传送带以v=4m/s的速度匀速运行，将一质量为2kg的工件沿竖直向下的方向轻轻放在传送带上（设传送带的速度不变），若工件与传送带之间的动摩擦因数为0.2，则放手后工件在4s内的位移是多少？摩擦力对工件做功为多少？（g取10m/s²）

同类题5

薄荷醇（化学式为C₁₀H₂₀O）可用于糖果、饮料的加香．下列有关薄荷醇的说法正确的是（）

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