小明家距学校1.5Km，一天，小明骑自行车上学，他以4m/s的速度行驶到刚好一半

发布时间：2017-06-17 10:46 │ 来源：www.tikuol.com

题型：选择题

问题：

小明家距学校1.5Km，一天，小明骑自行车上学，他以4m/s的速度行驶到刚好一半路程时，车扎带他只好停下来，补胎用了5min，接着又以6m/s的速度到达学校，则小明骑车从家到学校的平均速度约为（　　）

A．4.8m/s

B．5m/s

C．2.45m/s

D．4.8km/h

考点：速度的计算变速运动

题型：选择题

供氧式防毒面具使用前必须进行详细检查，氧气压力必须大于（）MPa，否则不得使用。

A.0.2

B.0.6

C.0.4

D.0.3

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题型：选择题

Looking for help：

I come to a new class and I have no friends.I really miss my old friends very much.And the most seriously, I am too shy to talk to others.I want to make more friends.What should I do？
Jim

I like playing computer games.But my parents don't want me to do it.They think I play computer games too much, but in fact I only play it for a short time and I often spend more time looking through useful information for my study and listening to music.I like music very much.I am very upset.What should I do？
Cathy

I can't study English well.There are so many English words for me to learn, and I can hardly remember them so I failed my English test last Friday.Can you help me？
Li Ping

Information Card

Jim has trouble in	小题1:________________.
Cathy spends more time	小题2:________________.
What Cathy's parents think	小题3:________________.
Who can't do well in English？	小题4:________________.
The time when Li Ping failed the test	小题5:_______________.

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题型：选择题

我国草地主要分布在年平均降水量不足_______毫米的西部内陆地区，这里集中了_______、_______、

__________、石山、永久积雪和冰川等难以利用的土地。

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题型：选择题

公务员晋升职务后，从晋升职务的当月起执行新任职务的职务工资和相应的级别工资。

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题型：选择题

（）是不锈耐酸钢和耐热钢的主加合金元素，还能提高抗高温气体的腐蚀性。

A.铬

B.钼

C.镍

D.钴

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