每一类IP地址都由两个固定长度的字段组成,其中一个字段是____,它标志主机(或路由器)所连接到的网络;而另一个字段则是____,它标志该主机(或路由器)。
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Attached to the bottom of the Trieste was a small, pressure-resistant sphere with enough room for just two people. ( )
A. Where was attached to the bottom of the Trieste
B. Which was attached to the bottom of the Trieste
C. What was attached to the bottom of the Trieste
D. That was attached to the bottom of the Trieste
He was impressed by the simplicity of the vessel's design. ( )
A. The simple design of the vessel left an impression of him.
B. The simple design of the vessel left an impression on him.
C. The simple design of the vessel leaves an impression with him.
D. The simple design of the vessel leaves an impression upon him.
Some features of the Deepsea Challenger- including its lights and cameras- would have been beneficial had they existed in 1960. ( )
A. would have been favorable if they have existed in 1960.
B. would have been conducive if been existed in 1960.
C. would have been advantageous if being existed in 1960.
D. would have been helpful if they had existed in 1960.
He'd say how you did this or how you did that, or what kind of problem you ran into with this. (
A. transferred
B. exaggerated
C. postponed
D. encountered
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