Why didn’t people begin to use unmanned vehicles in undersea exploration until r

游客2023-10-03 67

问题 Why didn’t people begin to use unmanned vehicles in undersea exploration until recently?
It is because of the ______.
[br] What does the author mean by saying "more challenging" in the last paragraph?

选项

答案 More demanding

解析

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Why didn’t people begin to use unmanned vehicles in undersea exploration until r

Doyouknowthepeople______liveovertheroad?A、whomB、whoC、whatD、whoseB本题

Peopleacquireknowledge,skills,【11】,values,orattitudesthrougheducatio

Peopleacquireknowledge,skills,【11】,values,orattitudesthrougheducatio

Peopleacquireknowledge,skills,【11】,values,orattitudesthrougheducatio

Peoplewhoworknightshiftsareconstantlyfightingagainstan“internalcl

Howoftenonehearschildrenwishingtheyhadgrownup,andoldpeoplewishi

Howoftenonehearschildrenwishingtheyhadgrownup,andoldpeoplewishi

Howoftenonehearschildrenwishingtheyhadgrownup,andoldpeoplewishi

Howoftenonehearschildrenwishingtheyhadgrownup,andoldpeoplewishi

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（2017年真题）2015年，泽恩集团年度利润总额是5000万元，当年，泽恩集团

商陆皂苷抗炎作用机制主要涉及A.抑制前列腺素合成 B.抑制白三烯 C.兴奋垂

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