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【单选题】
保险合同的双箩性与一般合同并不完全相同，即保险人的赔付义务只有在（ ）才履行，因而是附有条件的合同。A.
投保人交纳保险时
B.
保险人认可时
C.
被保险人要求时
D.
约定的事故发生时
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【简答题】British government wants UK to acquire coronavirus "herd immunity." According to over 200 scientists and medical experts, however, going for “herd immunity” at this point does not seem a viable option...
【简答题】能把异构的计算机网络相互连接起来,且可根据路由表转发IP数据报的网络设备是________。
【简答题】Listen again and correct the eight errors in this summary of the interview. Natural gas is far less environmentally friendly than other fossil fuels like oil and coal, but it is also being replaced by...
【单选题】An even more exciting find was reported in 1994, also from Pakistan. The now extinct whale Ambulocetus natans ("the walking whale that swam") lived in the Tethys Sea 49 million years ago. It lived aro...
A.
Fossil legs of early whales are a rare find.
B.
The legs provided important information about the evolution of cetaceans.
C.
The discovery allowed scientists to reconstruct a complete skeleton of the whale.
D.
Until that time, only the front legs of early whales had been discovered.
【简答题】能把异构的计算机网络相互连接起来，且可根据路由表转发IP数据报的设备是______。
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