Mary caught ______ last week, and she is suffering from ______ now.
A. a bad cold; a pneumonia
B. bad cold; pneumonia
C. a bad cold; pneumonia
D. bad cold; a pneumonia
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Just as the soil is a part of the earth, ___________ the atmosphere.
A. as it is
B. the same is
C. so is
D. and so is
在我国开展的所胃“一线通”业务中,窄带ISDN的所有信道可以合并成一个信道,以达到高速访问因特网的目的。它的速率为_______。
A. 16kbps
B. 64kdps
C. 128kbps
D. 144kbps
I, ________ , do not believe that the era of the pioneer is at an end; I only believe that the area for pioneering has changed.
A. for one's part
B. for one's good
C. for one
D. for oneself
保证数据的完整性就是_______。
A. 保证因特网上传送的数据信息不被第三方监视
B. 保证因特网上传送的数据信息不被篡改
C. 保证电子商务交易各方的真实身份
D. 保证发送方不能低赖曾经发送过某数据信息