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

游客2023-10-03 51

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

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Peoplewillliveunderthegroundbecause______.[br]Somecountriestrytobuil

Thegovernmentistobanpaymentstowitnessesbynewspapersseekingtobuy

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设计模式基于面向对象技术，是人们在长期的开发实践中良好经验的结晶，提供了一个简单

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