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

游客2023-10-06 79

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

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.

Inthiselectronicage,thestudentsnow______(宁愿单独一个人玩电脑，也不愿意到图书馆去查阅资料)prefert

根据《消防法》，我国消防组织的形式主要包括（）等。A.公安消防队 B.专职

C四周数字之和等于中间数字的4倍，故？=14X4-(20+13+7)=16。

下列哪一项不是左向右分流先天性心脏病的共同特点：()A.肺血流较多

某在用隧道，路面为水泥混凝土，进行隧道洞内运营环境检测，测得某个测区照度如下表所

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某社会工作服务机构近期要为下岗女工提供各种支持，以下选项中的支持措施不正确的是（

下列对“通胀预期”的理解，正确的是（ ）。A.能够得到准确验证的对未来物价上涨

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下列对“通胀预期”的理解，正确的是（　　）。A.能够得到准确验证的对未来物价上涨