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His recommendation that Air Force (investigate) ______ the UFO sighting was approved by the commission.

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若有以下程序： #include ＜iostream＞ using namespace std; class A protected: int a; public: A() a=10; ; class A1 : public A public: A1() a=a+1; ; class A2 : public A public: A2 () a=a+2; ; class B : public A1,public A2 public: B() void print() cout＜＜a＜＜end1; ; int main ( ) B obj; obj.print(); return 0; 程序运行后的输出结果是( )。

A. 产生语法错误
B. 11
C. 12
D. 10

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Question 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news. According to the news, where is the center of the quake

A. In India.
B. In Pakistan.
C. In Indian Kashmir.
D. In Pakistani-controlled Kashmir.

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在双链表中，每个节点有两个指针域，一个指向前驱节点，另一个指向【2】。

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Question 26 and 27 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news. What has the NASA report revealed

A. The global warming is slowing down.
B. The world’s climate is changing dramatically.
C. The ice around the arctic is disappearing very quickly.
D. A big storm has been formed around the arctic.

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His recommendation that Air Force (investigate) ______ the UFO sighting was approved by the commission.

Question 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news. According to the news, where is the center of the quake

在双链表中，每个节点有两个指针域，一个指向前驱节点，另一个指向 【2】 。

Question 26 and 27 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news. What has the NASA report revealed

在双链表中，每个节点有两个指针域，一个指向前驱节点，另一个指向【2】。