问题
单项选择题
铁路货车安全防范系统须在设备工程验收合格且试运行（）个月，方可由铁路局组织按验收程序进行运用验收。
A.1
B.2
C.3
D.4
答案
参考答案：D
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铁路货车安全防范系统须在设备工程验收合格且试运行（）个月，方可由铁路局组织按验收程序进行运用验收。
A.1
B.2
C.3
D.4
参考答案：D
| 从下面方框中选出5个单词，将它们填人短文空格内，使短文意思正确、通顺。(注意：每词 限用一次，其中有一词多余) | |
world. It's more 1.________ for people to find a job. And it's also more difficult for people to ride in the streets. Most people live 2.________ because they eat healthier food. Nobody eats meat very often 3.________ more and more people know it's important to have a healthy diet. They eat more 4.________ and fruit. They don't have to work long hours. They have more free time for sports and 5.________ for a trip. They can also surf the Internet. Every family has more than one computer. |