问题 单项选择题

脉冲序列中,使血液呈高信号的是()

A.进入层面效应,偶回波技术

B.流入性增强,飞越时间效应

C.舒张期血流增强,层面与血管平等

D.层面与血管垂直,偶回波技术

E.舒张期增强,飞越时间效应

答案

参考答案:A

解析:表现为高信号的血流:①流入增强效应。②舒张期假门控现象。③偶回波效应。④梯度回波序列(梯度回波序列血流呈现高信号)。

写作题

上周学校举行了初三年级家长会,家长、学生和老师进行了面对面的交流,尤芳芳代表同学们说出了困惑,表示了决心:

因为经常考试,她时常有些压力,有时感到心烦意乱;

作业多,没有时间…;不知如何平衡学习与玩耍.

老师告诉她放松的方法有很多:⑴多与父母或朋友交流,⑵……

现在她知道了时间的重要性,能按时交作业,已经取得很大的进步;

要求:1、短文要包括列举的要点并且适当发挥。

2、语言通顺,意思连贯,书写规范。

3、词数100词以上,文章的开头已给出,不计入总词数。

Last week our school held a parents’ meeting. Parents, students and teachers sat together and talked a lot.You Fangfang says she has a lot of problems. She __________________________     

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

问答题 简答题