关于机械运动,下列说法正确的是( ) A.空气的流动不属于机械运动 B.运动路线

题型:选择题

问题:

关于机械运动,下列说法正确的是(  )

A.空气的流动不属于机械运动

B.运动路线是直的,运动路程是不变的,这样的运动才是机械运动

C.一个物体位置改变就是运动,位置没有改变就是静止

D.判断一个物体是否运动和怎样运动,离开了参照物就失去了意义

考点:机械运动
题型:选择题

Mary has a lot of hobbies. She usually gets up early so she can run before work. She doesn't often have time to skate, but she sometimes goes on Saturdays during the winter. Mary often rides a horse near here home. She sometimes goes after work, but she usually goes horseback riding on Sundays. She loves music. She always goes to choir practice(合唱团训练) on Wednesday evenings and sings in church(教堂) on Sundays. She doesn't have much money, so she seldom(很少) goes to concerts(音乐会) in the city. She seldom watches TV because she likes doing things outside. She usually goes to the gym(体育馆) if it's raining outside. She isn't often alone(独自的) because she has a lot of friends. She sometimes does something alone, but she usually does her hobbies with one of her friends. She's a happy woman!

小题1:Mary often gets up early because she wants to _______.

A.have breakfast

B.clean her room

C.run

D.skate小题2:Mary usually goes horseback riding on _______.

A.Wednesday

B.Sunday

C.Saturday

D.workday小题3:Mary seldom ________ because she likes doing things outside.

A.goes to concerts

B.goes to the gym

C.goes to church

D.watches TV小题4:Mary seldom goes to concerts because she ______

A.isn’t rich(富有的)

B.is busy

C.doesn’t like music

D.has many friends小题5:Which of the following is not true?

A.Mary is often alone.

B.Mary likes running.

C.Mary has lots of friends.

D.Mary is a happy woman.

题型:选择题

2012年6月6日出现的金星凌日天象,是金星运行到太阳和地球之间,三者恰好在一条直线上时,金星挡住部分日面而发生的天象。对于这次金星凌日的时间和最佳观测地点,全球及我国许多的天文机构及专家早有精确的预报,与古时人们对其现象与本质不能正确认识形成了鲜明的对比。这体现了哲学基本问题上的

A.辩证法与形而上学的对立 

B.思维与存在何为第一性

C.唯物主义与唯心主义的对立    

D.思维与存在有没有同一性

题型:选择题

下面这段文字画线的两句话,各有一处语病,请在原句上改正。(4分)

在很大程度上,人类精神文明的成果是以书籍的形式保存的。①一个真正的读者就是通过读书来最大限度地享用这些成果的过程。②而一个人能否成为一个真正的读者,关键在于他在青少年时期养成好的读书习惯。

题型:选择题

下列有关投标文件的澄清和说明,表述正确的是( )。

A.投标文件不响应招标文件实质性条件的,可允许投标人修正或撤销其不符合要求的差异

B.单价与工程量的乘积与总价之间不一致时,以单价为准

C.投标文件中用数字表示的数额与用文字表示的数额不一致时,由投标人澄清说明为准

D.若投标单价有明显的小数点错位,应调整单价,并修改总价

题型:选择题

设计实验来区别NaOH和Na2CO3两种无色溶液,写明实验方法步骤、现象以及结论.

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