男性，20岁，有四肢关节疼痛病史，近半年来，时感心悸，活动后气_爱下问搜题

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问题单项选择题

男性，20岁，有四肢关节疼痛病史，近半年来，时感心悸，活动后气急，休息后缓解，体检：两颧紫红色，口唇轻度发绀，听诊：心尖区闻及舒张期隆隆样杂音，胸骨左缘第3～4肋间可闻及二尖瓣开放拍击音，P2亢进，分裂。

入院第2天后体检发现第一心音强弱不等，心率绝对不规则，心率120次/分，脉率100次/分，应考虑并发______

A．窦性心动过速

B．阵发性室上性心动过速

C．心房扑动

D．心房颤动

E．窦性心律不齐

答案

参考答案：D

解析：房颤的症状取决于有无器质性心脏病、心功能基础、心室率快慢及发作形式等。特发性房颤和心室率不快时可无症状。反之，可有心悸、气促、乏力和心前区不适感。房颤时心脏听诊时有第一心音，心率和心律均绝对不规则，由于部分心搏心排血量较少，常致脉搏短缺、强弱不等和血压测量结果差异较大等。

解答题

已知y=6x²-ax-a²，且当x=1时，y=0，求a的值．

完形填空

When I began planning to move to Auckland to study, my mother was worried about a lack of jobs and cultural differences. Ignoring these   1   I got there in July 2010.   2  I arrived, I realized the importance of getting a job   3 my living experience. Determined to do this 4 , I spent several weeks going door-to-door for a job, but found   5 response(回应)
One afternoon, I walked into a building to ask 6 there were any job opportunities(机会)，The people there advised me not to continue my job search in that   7 . As I was about to   8 , a man who had been listening approached me and asked me to wait outside   9 . Nearly ten minutes later, he   10 ,He asked me about my plans and encouraged me to stay   11 . Then he offered to take me to Royal Oak to 12 a job.
I was a little surprised, but had a 13  feeling about him. Along the way ,I realized that I had   14 resumes(简历). Seeing this, the man 15 at his business partner’s office to make me fifteen   16  copies. He also gave me some      17  on dressing and speaking. I handed out my resume and went home feeling very 18  . The following day, I received a   19  from a store in Royal Oak offering me a job.
It seems that the world always 20  to you when you need it .And this time, it was a complete stranger who turned out to be a real blessing.

C．instructions

C．by any chance

B．at any time

D．for a while

D．comfortable

A．made use of

B．taken care of

D．become tired of

D．suggestions

C．disappointed