[填空题]

A cutting fossils from rocks
B activity sheets for children
C sitting inside a T Rex jaw
D sitting on a dinosaur’s brain
E the smell of dead dinosaurs
F a map of where some dinosaurs lived
G an exhibition of dinosaur artwork

[填空题]

[单项选择] Lightening and thunder seem very different from fog，clouds，rain，wind，heat，and other things which make up the weather.（11）without knowing about the rest of the（12），one cannot understand lightening and thunder. Long ago，（13）scientists had begun to study the weather，everyone was afraid of lightening and thunder. （14）the ancient Greeks and Romans，thunder was the angry voice of （15）great god Zeus，or Jupiter. Today we know more about weather and （16）lightening and thunder too，though there（17） still much to be learned. People today are not often afraid of thunderstorms，though we know that lightening （18）dangerous. （19）we understand lightening and thunder，there is a thrill （激动） in watching a summer thunderstorm which clears the air and leaves us（20）. 17.（）
A. are
B. was
C. is
D. were

[单项选择]For each blank, choose the best answer from the four choices and write down on the answer sheet.
(71) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
(72) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.
(73) functions with two layers of protocols. It can connect networks of different, speeds and can be adapted to an environment as it expands.
A socket is composed of two addresses: (74) .
Heterogeneous network environments consist of computer systems from (75) vendors that run different operating systems and communication protocols.

A. ISO
B. ITU
C. IEEE
D. CCITT