罗马公元3世纪危机发生的原因和主要表现如何？

单词拼写（共10分，每题1分）

根据下列句子及所给汉语注解，写出空缺处各单词的正确形式。（每空只写一个单词）

66. On festivals they used to act and sing in praise of ____ (英雄) who lived long ago.

67. Abraham Lincoln was one of four presidents who were ____ (谋杀).

68. A ____ (图书管理员) is a person who is in charge of or helps to run a library.

69. My teacher is really very kind. I’ll never forget the ____ (恩惠) he has done to me.

70. The head teacher has made a few minor ____ (调整) to our seats.

71. She likes him, because he is ____ (体贴的) towards others.

72. When I said some people were so stupid, I wasn’t ____ (指) to you.

73. The weather of Xi’an in ____ (一月) is very cold, especially at night.

74. In the ____ (二十) century, country music became more and more popular in America.

75. A vast amount of the Amazonian rainforest is being ____ (破坏) every day.

屏障设施实验动物饲育室内一般不该设下水道，必须设下水道的排水日应有可密封的塞或盖子，以防野鼠和爬虫进入。

毛 * * 在1937年指出：“工农民主共和国的口号，过去的提出和今天的放弃，都是正确的。”

根据所学知识回答下列问题：（10分）

（1）试结合1927－1937年中国革命的实践，简要论述毛 * * 上述思想的正确性。（8分

（2）中 * * 党策略方针的这种变化体现了哲学中的那些思想？（2分）

如图所示，质量为m的物体从同一高度沿着不同仰角的斜面下滑，其仰角θ₁＜θ₂＜θ₃，物体跟各斜面间滑动摩擦因数都相同．若物体从斜面顶端滑至底端的过程中，物体的重力所做的功分别为W₁、W₂、W₃，则（　　）

A．W₁＞W₂＞W₃

B．W₁＜W₂＜W₃

C．W₁=W₂=W₃

D．无法确定

工程竣工验收前，（）应对相应的资料进行核查，核查人填写意见并签字。

A.建设单位

B.设计单位

C.监理单位

D.施工单位