问题 计算题

在平直公路上有甲、乙两辆车在同一地点向同一方向运动,甲车以10m/s的速度做匀速直线运动,乙车从静止开始以1m/s2的加速度作匀加速直线运动,问:

1)、甲、乙两车出发后何时再次相遇?

2)、在再次相遇前两车何时相距最远?最远距离是多少?

答案

(1)t1="10s      " (2)t2="5s         " (3)sm=50m

改错题

第II卷写作(共两节,满分30分)

第一节:短文改错(共10小题;每小题1分,满分10分)

此题要求改正所给短文的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上划一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

该行多一个词: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。

该行缺一个词: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。

该行错一个词:在错的词下划一横线,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。

Air pollution comes from factories, power stations or cars.                  71. ________

Chemicals in the smoke from power stations cause a lot of                             72. ________

damage. They can travel hundred of miles in the wind before                  73. ________

falling to the ground in the rain. But this “chemical rain” gradual            74. ________

destroys trees in the forests and kill fish in the lakes. In Germany,           75. ________

over 50% of the country’s trees had damaged by the year 1986.           76. ________

Time and time again there are serious accidents pollute the                   77. ________

air. In 1986 there was a bad accident at a nuclear power station in the          78. ________

Russia. A cloudy of radiation crossed the whole of Europe. It is said           79. ________

that 125,000 people died in Russia as a result of illnesses causing       80. ________

by this accident.

选择题