【单选题】【消耗次数：1】
窦性P波的方向应该是
①
除aVR导联倒置外，其余导联均应直立
②
Ⅱ、Ⅲ、aVF导联倒置，aVR导联直立
③
Ⅰ、Ⅱ、aVF、V4~V6导联直立，aVR导联倒置
④
V1导联正负双向，其余导联均应直立
⑤
Ⅰ、aVL、V1~V3导联倒置，aVR导联直立
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相关题目
【单选题】
心电图示Ⅱ、Ⅲ、aVF导联S-T段抬高与T波融合成单向曲线，首先考虑（）
①
急性前间壁心肌梗死
②
急性下壁心肌梗死
③
陈旧性下壁心肌梗死
④
急性心内膜下心肌梗死
⑤
陈旧性侧壁心肌梗死
【单选题】
设有向图D = áV, E?, 其中 V={v1, v2, v3, v4, v5}, E={áv4, v1?, áv1, v1?,áv1, v2?,áv1, v3?, áv3, v1?, áv5, v3?}，则v1的邻域 N(v1) =
①
{v3, v4}；
②
{v2, v3,v4}；
③
{v1, v2, v3, v4}；
④
{v2,v3}。
【单选题】
设有向图D = áV, E?, 其中 V={v1, v2, v3, v4, v5}, E={áv4, v1?, áv1, v1?,áv1, v2?,áv1, v3?, áv3, v1?, áv5, v3?}，则v1的闭邻域 N(v1) =
①
{v3, v4}；
②
{v2, v3,v4}；
③
{v1, v2, v3, v4}；
④
{v2,v3}。
随机题目
【单选题】
A: This is Mr. Bill and this is Mr. Paul. B: [填空]
①
How do you do?
②
How are you?
③
Fine，thank you.
④
Hi，how are you getting on?
【单选题】
A: How much is that rice, please? B: [填空].
①
Four Kilo
②
Very much
③
Four are enough
④
Four yuan a kilo
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/0418BF1D02417B92F76B614E1597FD00.png title=5.png alt=5.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/27CC83C93F9DEC1027C40DB516AEFFFE.png title=5-1.png alt=5-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/A52D2423E20F7AF67CDED3927DFBC6E8.png title=5-2.png alt=5-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/1CF3AA81CC78B903E42266CDBA6690AC.png title=5-3.png alt=5-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/286CB235C4A75DA8DDB21CABF734CF53.png title=5-4.png alt=5-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/50B8AB3880EC4FD1901EE390ABF55B59.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/5758B772498446FA82AC77D6D7F305E8.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/B6454D5F78F647A4D82E69A2B2819675.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/752DB2A405FFF9EE7DA06D85FB42F136.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/CEF05144723A27B982B70DE56A618B07.png title=2-4.png alt=2-4.png/>
【单选题】
阅读理解：阅读下列短文，回答文后问题，选择最佳答案Robert had just moved into the street and he felt strange that he was not wanted. He knew that perhaps the other boys were trying to get an idea of what kind of a boy he was. This did not help him to make himself less lonely. He was new and he had to be tested. Still, proving himself would not be all that easy. He did not want to run with the boys or get into something against the law to prove that he was strong. No! He must show what he was made of in a more helpful way. That’s when he got the idea.The next day was Saturday. He knew that most of the boys would be down on the playground and choose up sides for the Saturday game. Robert knew he could play well and that just might be enough to prove he was strong, and to make friends with them. He arrived early and did his step exercises. He shot the ball several times and did some other exercises—the most difficult and most wonderful in basketball. Then the boys came. Robert went through what he had done before the game and showed what he could do. No one said a word. The boys just looked at each other and thought about it. In the end, when it was all over, the biggest of the group just smiled and shook his head. Robert knew he had made it.4. What did the biggest of the group mean by shaking his head?
①
He did not want to say anything about what Robert had done.B. He had not thought Robert could play so wonderfully.C. He did not want to make friends with Robert.D. He did not think Robert played basketball well.
②
He had not thought Robert could play so wonderfully.
③
He did not want to make friends with Robert..
④
He did not think Robert played basketball well.
【单选题】
阅读理解：阅读下列短文，回答文后问题，选择最佳答案Robert had just moved into the street and he felt strange that he was not wanted. He knew that perhaps the other boys were trying to get an idea of what kind of a boy he was. This did not help him to make himself less lonely. He was new and he had to be tested. Still, proving himself would not be all that easy. He did not want to run with the boys or get into something against the law to prove that he was strong. No! He must show what he was made of in a more helpful way. That’s when he got the idea.The next day was Saturday. He knew that most of the boys would be down on the playground and choose up sides for the Saturday game. Robert knew he could play well and that just might be enough to prove he was strong, and to make friends with them. He arrived early and did his step exercises. He shot the ball several times and did some other exercises—the most difficult and most wonderful in basketball. Then the boys came. Robert went through what he had done before the game and showed what he could do. No one said a word. The boys just looked at each other and thought about it. In the end, when it was all over, the biggest of the group just smiled and shook his head. Robert knew he had made it.2. Why would it not be easy for Robert to prove himself?
①
Because he was not sure if he was really strong.
②
Because he was new and was not wanted in the street.
③
Because the other boys had found out what kind of a boy he was.
④
Because he must choose the best way to prove himself.