由同种元素组成的物质一定不是（ ） A．单质 B．化合物 C．混合物 D．纯净物

For Sparky, school was all but impossible. He failed every subject in the eighth grade. He didn’t do much better in sports. Although he played for the school’s golf team, he lost the only important match of the season.

Sparky was a loser. He, his classmates…everyone knew it. Sparky never asked a classmate to go out in high school. He was too afraid of being refused.

However, one thing was important to Sparky – drawing. He was proud of his artwork. Of course, no one else appreciated it. In his senior year of high school, he sent some cartoons to the editors of the Yearbook. Although the cartoons were turned down, Sparky was so confident about his ability that he decided to become an artist.

After completing high school, he wrote a letter to Walt Disney Studios. He was told to send some samples of his artwork, and the subject for a cartoon was suggested. Sparky spent a great deal of time on it. Finally, the reply came from Disney Studios. He had been rejected（拒绝）once again. Another loss for the loser.

So Sparky decided to write his own autobiography（自传）in cartoons. He described his childhood – a little boy loser and underachiever. The cartoon character would soon become famous worldwide. For Sparky, the boy who had little success in school and whose work was rejected again and again was Charles Schulz. He created the Peanuts comic strip（连环漫画）and little cartoon character – Charlie Brown.

小题1:We can know that Sparky was ________ from the first paragraph.

A．a top student

B．an artist

C．a good player

D．a failure小题2:Sparky never asked a classmate to go out because he ______.

A．had never been invited

B．didn’t like making friends

C．didn’t want to be refused

D．was afraid of making mistakes小题3:What’s Sparky’s success according to the passage?

A．He was good at golf playing.

B．He wrote a letter to Walt Disney Studios.

C．He drew some cartoons for the Yearbook.

D．His Peanuts comic strip became world famous.

已知f(x)是R上的奇函数，则f(0)的值为[ ]

A、1 　　 　

B、-1 　

C、0 　

D、不确定

自耦变压器和绝缘有要求的变压器中性点必须（）运行。

A.直接接地

B.间接接地

C.经消弧线圈接地

D.不接地

下列材料的牌号中属于优质碳素工具钢的是（）。

A.T8

B.T8Mn

C.30Mn

D.T11

E.Q295

F.T7

G.ZG.310-570

中国军事科学院专家表示：中国不会因为有了航母而调整自己的防御性国防政策，那些别有用心宣扬“中国威胁论”的说法是完全没有根据的。这是因为（）

①我国是联合国安理会常任理亊国之一②我国的国家性质决定我国的外交政策

③我国外交政策的目标和宗旨决定④我国是多极化格局中有影响的一极

A.①②

B.②③

C.①④

D.③④