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【单选题】
数字信号是在数值上和时间上都是不连续的，( )是数字信号的典型代表。A.
正弦波
B.
三角波
C.
矩形波
D.
尖峰波
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反馈参考答案：
举一反三
【简答题】This is a beautiful park near my home. People like to go to the park after work. Some of them go to the park every day. Look! This is Mr. Smith. He is sitting on a chair and watching the children. Som...
【单选题】病人,右胸部损伤,胸痛,右侧有明显的反常呼吸运动。X线检查右前胸部第4-8肋多处骨折,无血胸、气胸。急救应首选
A.
止痛
B.
保持呼吸道通畅
C.
局部置垫加压包扎
D.
输血、输液、抗休克
E.
吸氧
【单选题】听力原文：W: Oh, this is a beautiful city. I'm really glad I've brought my camera. M: Yes, there are lots of things to take pictures of here. But I hope you will not plan to spend all your time taking pict...
A.
To visit more places in the city.
B.
To take a lot of pictures of the beautiful city.
C.
To take some pictures of his friends.
D.
To spare some time to meet his friends.
【单选题】听力原文：W: This is a beautiful park. Shall we come again tomorrow? M: Don't we have to go shopping? W: We can do that in the afternoon, and come here in the morning. M: OK. And let's bring Hilda and Juli...
A.
They are going shopping.
B.
They are going to the park.
C.
They are going to the cinema with their children.
【单选题】听力原文：W：This is a beautiful park．Shall we come again tomorrow? M：Don’t we have to go Shopping? W：We call do that in the afternoon，and come here in the morning． M：OK．And let’s bring Hilda and Julia with...
A.
They are going shopping．
B.
They are going to the park．
C.
They are going to the cinema with their children．
【简答题】阅读理解 This is a beautiful park near my home. People like to go to the park after work. Some of them go to the park every day. Look! This is Mr. Smith. He is sitting on a chair and watching the children...
【单选题】病人,右胸部损伤,胸痛,右胸有明显的反常呼吸运动。x线检查右前胸部4~8肋多处骨折,无血气胸。急救应首选
A.
止痛
B.
保持呼吸道通畅
C.
局部置垫加压包扎
D.
输血输液、抗休克
E.
吸氧
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