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【简答题】
模拟信号在时间和数值上均具有___________(连续/离散)性;数字信号在时间和数值上均具有___________(连续/离散)性。
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反馈参考答案：
举一反三
【单选题】患者男性，32岁，既往有胃病史，近一周来，常感上腹部不适，4小时前突发上腹部剧烈疼痛，伴有恶心、呕吐，查体腹部压痛、肌紧张，肝浊音界缩小，X线检查可见膈下游离气体，首先考虑（）。
A.
急性阑尾炎穿孔
B.
胆囊炎穿孔
C.
急性胰腺炎
D.
溃疡病穿孔
【单选题】_____， he often forgot to turn off the lights.
A.
Even better
B.
Strange
C.
However
D.
Fortunately
【单选题】在Word的“开始”选项卡“剪贴板”组中,如果“复制”和“剪切”命令呈灰色,则表示( )。
A.
在文档中没有选定任何对象
B.
编辑的是页眉和页脚的内容
C.
剪切板已满
D.
选定的文档太长,剪贴板无法容纳
【简答题】Fortunately, however, ancient men made tools of stone, especially flint. This is easier to shape than other kinds.
【单选题】金先生,52岁。十二指肠溃疡25年,上腹部隐痛1年,近1个月又出现呕吐,吐隔夜宿食呕吐逐渐加重,精神状态差,消瘦明显,皮肤弹性差,贫血貌,胃镜检查确诊为十二指肠溃疡并幽门梗阻。决定近期行胃大部切除术。从提高手术耐受力考虑,首要的护理诊断是
A.
活动无耐力
B.
知识缺乏
C.
营养失调 低于机体需要
D.
焦虑.恐惧
E.
有感染的危险
【简答题】Fortunately, however, ___1____men made tools of stone, especially __2____, because this is easier to ___3__ than other kinds. They may also have used wood and skins, but these have ___4___ away. Stone...
【单选题】There was an earthquake on the coast yesterday. Fortunately, there was no loss of life. However, because of the er of collapsing sea walls, it was essential that the area _______ evacuated quickly...
A.
to be
B.
will be
C.
be
D.
is
【单选题】硬盘参数“200G/IDE/3.5寸/7200rmp/8M/SATA300”中“8M”指()。
A.
硬盘的工作频率为8MHz
B.
磁盘的缓存为8MB
C.
磁盘的缓存为8mb
D.
磁盘的数据传输率为8MB/s
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