市、县主干道两侧建筑面积（）以上或工期一年以上的上程，施工现

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问题单项选择题

市、县主干道两侧建筑面积（）以上或工期一年以上的上程，施工现场的道路、作业场地要采用混凝土硬化。

A、5000m²

B、8000m²

C、6000m²

答案

参考答案：B

阅读理解

读小短文，然后做题。

There are many books on the shelves in my home. Some are my father's, and some are my mother's. And

some are mine. We all like books very much. We learn a lot from books. They tell us what is good and what is

bad. Sometimes I give some books to my classmates. They like to read them, too. We often say, " Books are

our good friends."

1. What're on the shelves? There are _____________ books.

2. Who do you sometimes give the books to? Sometimes I give books to my _____________.

3. Do your classmates like to read them? Yes, _____________ _____________.

4. What do we often say? We often say, " _____________ are our good _____________."

5. Whose books are they? They are _______________.

A. my father's

B. my mother's

C. mine

D. A, B and C

6. We can learn something new from _______________.

A. the books

B. my mother

C. my father

D. A, B and C

不定项选择

如图所示，在一个直立的光滑管内放置一个轻质弹簧，上端O点与管口A的距离为2x₀，一个质量为m的小球从管口由静止下落，将弹簧压缩至最低点B，压缩量为x₀，不计空气阻力，弹簧弹性势能的表达式为，则

A.小球运动的最大速度等于

B.弹簧的劲度系数为

C.球运动中最大加速度为g

D.弹簧的最大弹性势能为3mgx₀