在匀速直线行驶的火车上，竖直向上抛出一个小球，小球将落在抛出_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

在匀速直线行驶的火车上，竖直向上抛出一个小球，小球将落在抛出点的[ ]

A、前方

B、后方

C、正下方

D、左方或右方

答案

答案：C

改错题

此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画
一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下画一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。

    I have a good friend who's name is Liu Mei. She is our
monitor and one of the excellent students on our class.
Although she is clever, but she works very hard. We have a
lot on common and have a lot to talk about. One evening she
told me that something happened when her parents out.
She was doing her homeworks one Sunday morning when
she smelt something burning. She stopped look out
of the window and find a cloud of smoke coming out
of her neighbour's house. She called 119 immediate. Ten
minutes later, the firemen came and put out fire. Her neighbour
was very thankful for her help.

1.______
2.______
3.______
4.______
5.______
6.______
7.______
8.______
9.______
10.______

单项选择题

根据ISO7730规定，考虑经济节能等因素，我国长江流域住宅室内环境要达到一级，即舒适性标准，（）。尽量按照“冬季取低，夏季取高”的原则来进行参数选择。

A.冬季取暖只要不低于18℃，夏季制冷不高于28℃即可

B.冬季取暖只要不高于18℃，夏季制冷不低于28℃即可

C.冬季取暖只要不低于20℃，夏季制冷不高于28℃即可

D.冬季取暖只要不高于20℃，夏季制冷不低于28℃即可