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

游客2024-07-24 20

问题 Why didn’t people begin to use unmanned vehicles in undersea exploration until recently?
It is because of the ______.
[br] When must the sonar devices be placed?
Before the ______.

选项

答案 undersea vehicle dives

解析

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

Cellphonescanmakeourlife______.[br]Ifpeopleleavetheirphonesathome,

Todayalmosteverybodyisusingacellphone.Nowpeopleareabletocarryt

Nowmanyyoungpeoplespendseveralhoursaday(talk)________onamobilephone

Thousandsofpeopletookpartintheworkwhentheoldtemple______.A、wasrebui

People(live)______comfortablyinthetownshardlyfeelthepleasureofliving

People(live)______comfortablyinthetownshardlyfeelthepleasureofliving

Doctorsbelievethatsecond-handsmokemaycauselungcancerinpeoplewho

Doctorsbelievethatsecond-handsmokemaycauselungcancerinpeoplewho

Doctorsbelievethatsecond-handsmokemaycauselungcancerinpeoplewho

Nowmanyyoungpeoplespendseveralhoursaday(talk)______onamobilephone。(in

Tedhastotakeabustohisofficethesedaysbecausehiscar______.A、isrepair

[audioFiles]audio_etoefz_019(20051)[/audioFiles]A、Themanshouldhurrytothel

Sothetheoriesoftheschoolsaredifferentfromthepracticeofordinarybusin

Duringthe1980s,unemploymentandunderemploymentinsomecountrieswasas

Congestedcitiesarefastbecomingtesttubesforscientistsstudyingthei

()是两岸关系的政治基础。

白鹤物流公司计划购入一架二手飞机用于运输，在评估时发现二手市场上有一架飞机的型号

对于特殊过程的质量控制，除了按照一般过程质量控制的规定执行外，还应做到的是()。

设β1，β2是线性方程组Ax=b的两个不同的解，a1、a2是导出组Ax=0的基础

欲进行肺癌危险因素的病例对照研究，下列不能作为对照的是A.支气管炎病人 B.意