1．(安徽3)下列曲线中离心率为的是

(A)　　 (B)　　 (C)　　 (D)

答案：B　　 解析：由得，选B

90. To tell the truth, with so many people helping you, you needn’t worry/ you don't need to worry/ there is no need for you to worry.

89. It is a scientist that I want to be when I grow up.

88. Many young people feel/ think it (is) more and more difficult to find a good job.

87. Now/ Nowadays, the Internet is playing an important part/role in people’s life.

86. I couldn't/ can’t help laughing at his way of talking.

85. is/was admitted

82. being taken/having been taken　　 83. had expected 　　　　　　　　　　 84. leaving

79. have lived/ have been living 　　　 80. to have been killed　　　　 81. heard

76. is being painted 　　　　　　　　　　　　 77. will/is going to attract 　 78. tastes