皮皮学，免费搜题
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搜题
【单选题】
( )是以货物通过国境作为统计进出口的依据,( )是以货物经过海关作为统计进出口的标准。
A.
总贸易、专门贸易
B.
专门贸易、总贸易
C.
转口贸易、过境贸易
D.
过境贸易、转口贸易
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
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皮皮学刷刷变学霸
举一反三
【单选题】Can you describe _____? [     ]
A.
how your friend is like
B.
what does your friend look like
C.
how your friend like is
D.
what your friend is like
查看完整题目与答案
【单选题】— ______? — He's great. [     ]
A.
What's your friend
B.
How does your friend know it
C.
What do you think of your friend
D.
How do you know your friend
查看完整题目与答案
【多选题】关于单位阶跃信号【图片】，描述正确的是
A.
其傅氏变换是
B.
其拉氏变换是1/s
C.
其拉氏变换是s
D.
其傅氏变换是1
查看完整题目与答案
【单选题】关于信号【图片】描述正确的是__________。‍
A.
该信号的基波频率是 1 Hz
B.
该信号是非周期信号。
C.
该信号的基波角频率是 1 rad/s。
D.
该信号的平均功率是 0.25 W。
查看完整题目与答案
【多选题】关于单位冲激信号【图片】，描述正确的是
A.
其傅氏变换是1
B.
其拉氏变换是1
C.
其傅氏变换是
D.
其傅氏变换是s
查看完整题目与答案
【单选题】One advantage of doing shopping with your friend is that your friend can pay for what you want.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】What will your support mean to your friend?
A.
It may help your friend succeed.
B.
It may let your friend feel valued.
C.
It may make your friend find his true self.
D.
It may make your friend feel closer to you.
查看完整题目与答案
【多选题】以下关于图示噪音信号描述正确的是？【图片】
A.
是功率信号
B.
是能量信号
C.
是随机信号
D.
是确定性信号
查看完整题目与答案
【单选题】关于信号【图片】描述正确的是（ ）。
A.
该信号是非周期信号。
B.
该信号的基波角频率是 1 rad/s。
C.
该信号的基波频率是 1 Hz。
D.
该信号的平均功率是 0.25 W。
查看完整题目与答案
【单选题】You and your friend are enrolled in the same class. You do not have time to study and ask your friend if you can copy from him during the exam. Your friend reluctantly agrees. Has your friend commi...
A.
Yes
B.
No
C.
It depends
查看完整题目与答案
相关题目：
【单选题】Can you describe _____? [     ]
A.
how your friend is like
B.
what does your friend look like
C.
how your friend like is
D.
what your friend is like
查看完整题目与答案
【单选题】— ______? — He's great. [     ]
A.
What's your friend
B.
How does your friend know it
C.
What do you think of your friend
D.
How do you know your friend
查看完整题目与答案
【多选题】关于单位阶跃信号【图片】，描述正确的是
A.
其傅氏变换是
B.
其拉氏变换是1/s
C.
其拉氏变换是s
D.
其傅氏变换是1
查看完整题目与答案
【单选题】关于信号【图片】描述正确的是__________。‍
A.
该信号的基波频率是 1 Hz
B.
该信号是非周期信号。
C.
该信号的基波角频率是 1 rad/s。
D.
该信号的平均功率是 0.25 W。
查看完整题目与答案
【多选题】关于单位冲激信号【图片】，描述正确的是
A.
其傅氏变换是1
B.
其拉氏变换是1
C.
其傅氏变换是
D.
其傅氏变换是s
查看完整题目与答案
【单选题】One advantage of doing shopping with your friend is that your friend can pay for what you want.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】What will your support mean to your friend?
A.
It may help your friend succeed.
B.
It may let your friend feel valued.
C.
It may make your friend find his true self.
D.
It may make your friend feel closer to you.
查看完整题目与答案
【多选题】以下关于图示噪音信号描述正确的是？【图片】
A.
是功率信号
B.
是能量信号
C.
是随机信号
D.
是确定性信号
查看完整题目与答案
【单选题】关于信号【图片】描述正确的是（ ）。
A.
该信号是非周期信号。
B.
该信号的基波角频率是 1 rad/s。
C.
该信号的基波频率是 1 Hz。
D.
该信号的平均功率是 0.25 W。
查看完整题目与答案
【单选题】You and your friend are enrolled in the same class. You do not have time to study and ask your friend if you can copy from him during the exam. Your friend reluctantly agrees. Has your friend commi...
A.
Yes
B.
No
C.
It depends
查看完整题目与答案