正确答案: D

has been

题目：Not only the switches but also the old wiring ________ changed．

解析：遇到not only．．．but also的句型时，谓语动词的单复数与靠近它的名词一致。Old wiring是单数，谓语动词为单数。选项D是正确的。句子大意：不光是开关，就连旧的线也换了。

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学习资料的答案和解析：

[单选题]《长亭送别》的语言特色是

优美雅致

[单选题]The author tends to think that the fifth level________

回答下面的题目Human needs seem endless．They might be regarded as making up several levels．When there is　enough money to satisfy one level of needs, another level appears．The first and most basic level of needs involves food．Once this level is satisfied, the second level　of needs, clothing and some sort of shelter, appears．By the end of World War Ⅱ , these needs were satisfied for a great majority of Americans．Then a third level appeared．It included such items as automobiles and new houses．By 1957 or 1958 this third level of needs was fairly well satisfied．Then, in the late 1950s, a　fourth level of needs appeared: the "life-enriching level．While the other levels involve physical satisfaction, that is, the feeding, comfort, safety, and transportation, this level stresses mental needs for recognition, achievement, and happiness．It includes a variety of goods and services．Among them are vacation trips, the best medical and dental care, and recreation．Also included here are fancy goods and the latest styles in clothing．On the fourth level, a lot of money is spent on services, while on the first three levels more isspent on goods．A fifth level would probably involve needs that can be achieved best by community action．Consumers may be spending more on taxes to pay for government action against disease, ignorance, crime, and prejudice．After filling our stomachs, our clothes closets, our garages, our teeth, and our minds, we now may seek to ensure the health, safety, and leisure to enjoy more fully the good things on the first four levels．According to the passage, man will begin to think about such needs as housing and clothing only when________

can be the last and most satisfying level

解析：最后一段。最后的等级就是上了税等着政府做事，我们只享受就是了。选项C是正确的。Spending more on taxes to pay for government action against．．．付更多的税给政府，政府再有所行动……。不赋税，政府就不行动，第五个等级的满足就不会实现。

[单选题]受五四新思潮的冲击，巴金最先接受了什么思想的影响?（　　）

俄国民粹派

解析：【答案】B

[单选题]阶级社会形成以来的婚姻家庭制度是 （　　）

一夫一妻制

[单选题]以下部位中，氧分压由高到低排列的是 （　　）

大气、肺泡、肺静脉血、肺动脉血

[单选题]出入肝门的结构是（　　）

肝固有动脉

[多选题]膀胱 （　　）

属腹膜问位器官

空虚时位于盆腔内

颈的中央有尿道内口

[单选题]阻塞枉黄疸时，尿液检查结果为（　　）

尿胆原减低，胆红素阳性

[单选题]脑水肿的防治中哪项不正确（　　）

限制晶体液输入