正确答案: B

美国

题目：出品《未来世界》、《超人》这两部影片的国家是_____ ( )

解析：B

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举一反三的答案和解析：

[单选题]下列不是低钾血症表现的是 （ ）

躁动、兴奋

[单选题]“不破楼兰终不还”一句运用的修辞手法是( )

借代

解析：【答案】C

[单选题]第 12 题 邓小平首次提出一国两制的概念是在（　　）

1982年

[单选题]According to the passage, the average IQ is ______.

100

解析：答案为B。根据第二段倒数第二句，Mark's IQ was 125，twenty-five points higher thar the average得出选项B为正确答案。

[单选题]Which sentence in the second paragraph is the topic sentence?

They were house keys.

解析：

42．答案为D  因为全文讲述的都是一些有关“钥匙儿童”的情况，再根据文章第2段最后一句Slowly，she learned they were house keys可知孩子们脖子上戴的是串钥匙，推知此题答案为D。

[单选题]肺循环的动脉起于( )

右心室

[单选题]George asked the question because he wanted to show that he was ______.

eager to learn

解析：

    47．答案为D  此考题为细节题。根据文章最后一段第2句George thought that he had better ask a few questions to show how interested he was and how much he wanted to learn to fly，就可肯定D正确。而 A的意思是“有趣的”，而不是“感兴趣的”，B的意思是“不紧张的”，C的意思是“不同的”．故A，B和C是错误的。