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【单选题】
潜水员在执行水下任务的过程中,普遍采用信号绳作为主要通信工具,即通过对信号绳的拉、抖组成系列信号来实现对陆上的简易通信。这种通信方式便捷、直接,但是其弊端也是显而易见的:信号绳仅能实现有限信息量的表达,且信号传输过程极易受复杂海水环境影响而中断或失效,带来安全隐患。2015年,就潜水员的信号绳被缠住而险些发生事故。可以说,潜水员在执行水下任务时,是真正的命悬一“线”。针对信号绳的诸多弊病,结合智能穿戴设备在民用领域的快速发展,面向军事潜水领城的智能穿戴产品逐新成为科技工作者的研发热点之一。这段文字接下来最可能讲的是:
A.
军事潜水领域智能穿戴设备的关键技术
B.
信号绳在军事领域传递信息中的缺陷
C.
日常生活中智能穿戴设备的发展现状
D.
人工智能技术引入穿戴设备的前景预期
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【单选题】It is in that primary school ________ Mary once studied for six years that she will build a library,________ delights all the students and teachers in the school.
A.
where;that
B.
that;that
C.
that;which
D.
where;which
【判断题】微机阶段式电流保护是逐相判断动作条件的。
A.
正确
B.
错误
【单选题】She often thinks that her six years in Italy were wasted, ______ she ______ that time learning more Italian.
A.
but that might have taken
B.
for that should have found
C.
in that could have spent
D.
with that would have used
【简答题】A.She's studied the piano for six years. B.She studied the guitar for three months. C.She doesn't have any. D.She has very little.
【简答题】Maria was born in Peru(秘鲁).She grew up in a small village. She 46 when she was six years old. She went to elementary school,but she 47 to high school. Her family was very 48 ,and she had to go to work...
【判断题】设 , , , 是 相互独立的 随机变量 ,则其中任取 个随机变量也相互独立.( )
A.
正确
B.
错误
【单选题】She has a _____ daughter. [     ]
A.
six-years-old
B.
six-year-old
C.
six years old
D.
six year old
【单选题】---How old is your sister?  --She is __ than I.
A.
older six years
B.
six years older
C.
six years elder
D.
older by six year
【简答题】Look at this photo. The girl is from Beijing. She is six years old. She is not tall and she has short black hair. She has big eyes, a small nose and a wide mouth. She is in old clothes. Now she is los...
【单选题】She went to the _____ school when she was six years old.
A.
primary
B.
principal
C.
average
D.
common
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