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

游客2023-10-06 92

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

转载请注明原文地址:http://tihaiku.com/zcyy/3075105.html

相关试题推荐

Fewpeoplecan______themorningexerciseseveryday.A、insisttoB、goonC、wipe
Peoplegenerallycalleachotherbytheir(11)muchsoonerintheiracquaintance
Peoplegenerallycalleachotherbytheir(11)muchsoonerintheiracquaintance
TheRedCrossisaninternationalorganizationwhichcaresforpeoplewhoare
Themiddlepartofthe20thcenturybroughtnewwaystohelppeoplegetoverdis
Thepassagestatesthatpeoplefromvariouscultures______.[br]Generallyhost
Thepassagestatesthatpeoplefromvariouscultures______.[br]Accordingtot
Thepassagestatesthatpeoplefromvariouscultures______.[br]Inthethirds
Georgeisoneofthosepeoplewho______troubleinworkingoutthisproblem.A、h
Whenpeoplebecomegoodatdoingthethingstheyliketheyfindthemselves.

随机试题

Robotshavebeenthestuffofpopularcultureforsolongthatwethinkoft
Ofthemillionsofinventions,whataretheeightgreatest?I’
ThePowerofNiceInfiction,filmandpopularcultu
我国医院住院药房调剂工作采用的方法不包括A.凭处方发药B.病区小药柜制C.柜台式
简述短时记忆特点。
表11-2-1中，规划名称、编制主体、审批主体不符合相关法律规定的是（　　）。
（）是指产品在特定事件发生时即终止，投资者不必等到产品到期即可收到产品的最
在国际海上货物运输保险中，投保下列哪些险别可以向保险公司转嫁被保险货物在运输途中
采用开放式、半开放式高温作业，利用自然通风，应尽量（）对热源隔离。 A.在
当水质条件为水库水，悬浮物含量小于100mg/L时，应采用的水处理工艺（）

最新回复(0)

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

Fewpeoplecan______themorningexerciseseveryday.A、insisttoB、goonC、wipe

Peoplegenerallycalleachotherbytheir(11)muchsoonerintheiracquaintance

Peoplegenerallycalleachotherbytheir(11)muchsoonerintheiracquaintance

TheRedCrossisaninternationalorganizationwhichcaresforpeoplewhoare

Themiddlepartofthe20thcenturybroughtnewwaystohelppeoplegetoverdis

Thepassagestatesthatpeoplefromvariouscultures______.[br]Generallyhost

Thepassagestatesthatpeoplefromvariouscultures______.[br]Accordingtot

Thepassagestatesthatpeoplefromvariouscultures______.[br]Inthethirds

Georgeisoneofthosepeoplewho______troubleinworkingoutthisproblem.A、h

Whenpeoplebecomegoodatdoingthethingstheyliketheyfindthemselves.

Robotshavebeenthestuffofpopularcultureforsolongthatwethinkoft

Ofthemillionsofinventions,whataretheeightgreatest?I’

ThePowerofNiceInfiction,filmandpopularcultu

我国医院住院药房调剂工作采用的方法不包括A.凭处方发药B.病区小药柜制C.柜台式

简述短时记忆特点。

表11-2-1中，规划名称、编制主体、审批主体不符合相关法律规定的是（ ）。

（）是指产品在特定事件发生时即终止，投资者不必等到产品到期即可收到产品的最

在国际海上货物运输保险中，投保下列哪些险别可以向保险公司转嫁被保险货物在运输途中

采用开放式、半开放式高温作业，利用自然通风，应尽量（）对热源隔离。 A.在

当水质条件为水库水，悬浮物含量小于100mg/L时，应采用的水处理工艺（）

表11-2-1中，规划名称、编制主体、审批主体不符合相关法律规定的是（　　）。