皮皮学，免费搜题
登录
搜题
【简答题】
如果无法确定信号在任意指定坐标点的数值,则这种信号就叫做非确定性信号或_________。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】It may take large bodies of water and ice decades to respond to changes in temperature.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】An ______is very large piece of ice floating in the sea.
A.
ice box
B.
iceberg
C.
ice cream
D.
iceland
查看完整题目与答案
【单选题】下列货物不属于压缩、液化或加压溶解的气体的是（）
A.
氧气
B.
乙炔
C.
乙醚
D.
空气
查看完整题目与答案
【单选题】Large chunks of ice and snow melt very slowly. Once they begin to melt, several weeks of warm weather may be required before they are totally dissolved .
A.
融化
B.
融合
C.
发现
D.
旋转
查看完整题目与答案
【单选题】下列 不属于气体货物
A.
红葱
B.
尿素
C.
味素
D.
蚕蛹粉
查看完整题目与答案
【单选题】在室温时,珠光体含量较多的钢是:
A.
含碳量0.2%的钢
B.
含碳量0.45%的钢
C.
含碳量0.6%的钢
D.
含碳量0.75%的钢
查看完整题目与答案
【单选题】下列不属于货物透气系统的是：（）
A.
惰性气体管线
B.
风机
C.
挡火帘
D.
透气ｘ管
查看完整题目与答案
【单选题】For the【C1】______month, mysterious falls of large chunks of ice(冰雹)【C2】______rained down on Spain and Italy. Juana Sanchez, a 70-year-old woman in Almeria, southern Spain, was knocked 【C3】______when s...
A.
last
B.
past
C.
passed
D.
early
查看完整题目与答案
【单选题】关于肝小叶的特征,下列哪项错误?
A.
是主要由肝板、肝窦和中央静脉组成的多角棱柱体
B.
是肝的结构单位
C.
胆小管位于相邻肝细胞之间
D.
人的肝小叶之间结缔组织较多，分界明显
E.
肝窦的血流汇集于中央静脉
查看完整题目与答案
【单选题】Glaciers are large masses of ice on land that show evidence of past or present movement. They grow by the gradual transformation of snow into glacier ice. A fresh snowfall is a fluffy mass of loosely ...
A.
The effect of glaciers on climate
B.
Damage from glaciers
C.
Glacier formation
D.
The location of glaciers
查看完整题目与答案
相关题目：
【单选题】It may take large bodies of water and ice decades to respond to changes in temperature.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】An ______is very large piece of ice floating in the sea.
A.
ice box
B.
iceberg
C.
ice cream
D.
iceland
查看完整题目与答案
【单选题】下列货物不属于压缩、液化或加压溶解的气体的是（）
A.
氧气
B.
乙炔
C.
乙醚
D.
空气
查看完整题目与答案
【单选题】Large chunks of ice and snow melt very slowly. Once they begin to melt, several weeks of warm weather may be required before they are totally dissolved .
A.
融化
B.
融合
C.
发现
D.
旋转
查看完整题目与答案
【单选题】下列 不属于气体货物
A.
红葱
B.
尿素
C.
味素
D.
蚕蛹粉
查看完整题目与答案
【单选题】在室温时,珠光体含量较多的钢是:
A.
含碳量0.2%的钢
B.
含碳量0.45%的钢
C.
含碳量0.6%的钢
D.
含碳量0.75%的钢
查看完整题目与答案
【单选题】下列不属于货物透气系统的是：（）
A.
惰性气体管线
B.
风机
C.
挡火帘
D.
透气ｘ管
查看完整题目与答案
【单选题】For the【C1】______month, mysterious falls of large chunks of ice(冰雹)【C2】______rained down on Spain and Italy. Juana Sanchez, a 70-year-old woman in Almeria, southern Spain, was knocked 【C3】______when s...
A.
last
B.
past
C.
passed
D.
early
查看完整题目与答案
【单选题】关于肝小叶的特征,下列哪项错误?
A.
是主要由肝板、肝窦和中央静脉组成的多角棱柱体
B.
是肝的结构单位
C.
胆小管位于相邻肝细胞之间
D.
人的肝小叶之间结缔组织较多，分界明显
E.
肝窦的血流汇集于中央静脉
查看完整题目与答案
【单选题】Glaciers are large masses of ice on land that show evidence of past or present movement. They grow by the gradual transformation of snow into glacier ice. A fresh snowfall is a fluffy mass of loosely ...
A.
The effect of glaciers on climate
B.
Damage from glaciers
C.
Glacier formation
D.
The location of glaciers
查看完整题目与答案