某物体沿直线运动，其v-t图象如图所示，则下列说法正确的是（ ） A．第1s内和
题型：选择题
问题：
| 某物体沿直线运动，其v-t图象如图所示，则下列说法正确的是（ ） A．第1s内和第6s内速度方向相反 B．第1s内和第6s内的加速度方向相反 C．第2s内的加速度为零 D．第6s末物体回到原出发点  |
题型：选择题
任务型阅读。
请认真阅读下面短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。
注意：每空格1个单词。
It is December thirty-first, 2007, the time when the old year dies and the New Year is born.
Many Americans have parties at home and invite all their friends. Many of these events are noisy. People shout
and sing. They often blow on small noisemakers when the New Year arrives at midnight. They kiss their husband or
wife or the person they are with. They dance to music. Other Americans spend a quiet evening at home.They drink
Champagne at midnight to welcome the New Year.
Some people drink too much alcohol at New Year's Eve celebrations.This can lead to tragic results if a person
drinks too much and then drives a car. The National Safety Council says hundreds of people die in road accidents
during the holiday.
In recent years,the danger of accidents has resulted in a new tradition called the"designated driver" One person
among a group of friends drinks little or no alcohol during New Year's Eve celebrations. Then this designated driver
can safely drive the other people home. Many American cities also offer free taxi service on New Year's Eve to take
people home safely.
Other Americans observe the coming of the New Year at events without alcohol.More than 220 American cities
hold these First Night celebrations. Artists in Boston Massachusetts started the tradition of First Night celebrations.
In 1976.They wanted to observe the coming of a New Year. But they did not want to hold noisy drinking parties. So
they organized music concerts, art exhibitions and other events to observe the holiday.
