I go to the park________ bike._刷题宝

题干

I go to the park________ bike.

A：by

B：on

C：in

上一题下一题 0.0难度选择题更新时间:2018-09-21 09:14:43

答案(点此获取答案解析）

A

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下列生物分类的等级单位中，包含生物种类最多的是（）

同类题2

如图是一个密闭的汽缸，活塞P初始时被插销K固定住，汽缸内还插有一支温度计M，汽缸内气压大于汽缸外的气压．当拔去插销K后，可以看到活塞P向____（填“左”或“右”）运动，同时观察到温度M的示数在____（填“升高”、“降低”或“不变”）．

同类题3

选择正确的解释。

端 A. (东西的)头 B.端正 C.平举着拿 D.项目

①妈妈端上一道我最喜爱吃的菜。____

②一进门，我就看见爸爸端坐着，眼睛瞪着我。____

③天上的云变化多端。 ____

④目前我们国家在研究许多尖端科技。 ____

同类题4

May 10th is Meg’s birthday. She gets a gift from her sister. It is a new coat .The coat is very beautiful and she feels very happy.

One day, Meg finds that a button(纽扣) of her coat is lost. She looks for the button everywhere, but she can’t find it. The next day, she doesn’t wear that coat to school and feels sad all day. After school, she goes to the clothes shops and wants to buy that kind of clothes. But she doesn’t find it. She feels very disappointed.

Meg tells her sister about that, and her sister says, “We can change all the buttons. Then the buttons will be the same.” The coat is beau tiful again and Meg feels happy again.

同类题5

已知函数f（x）=x³+ax²+bx+c，g（x）=3x²+2ax+b（a，b，c是常数），若f（x）在（0，1）上单调递减，则下列结论中：①f（0）•f（1）≤0；②g（0）•g（1）≥0；③a²﹣3b有最小值．

正确结论的个数为（）

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