【单选题】-Why were you shouting at Tom? -I told him to be quiet, but he __ talking.
【判断题】用IUPAC系统命名法命名化合物 是苯酚;
【单选题】Why were you late for school this morning, Tom? I was about to go to school __ it began to rain.
【单选题】下列关于SPECT门控采集的描述,错误的一项是
A.
门控采集多用于脏器功能评价和腔内异常结构的诊断
B.
门控采集是连续采集多帧图像,要求图像不能有位移,必要时可以用正弦图方式来判定
C.
示踪剂的标记率要高,大于90%,从血液循环中清除要慢,标记性能稳定
D.
门控采集强调功能判断与时间分辨,矩阵选取64×64
E.
每周期或R-R间期采集帧数16~32,偶数为宜,采集总心动周期数:30~50
【单选题】----- Tom, why were you _____ from school yesterday?
A.
I got a bad cold and my mother took me to the doctor’s.
【单选题】— Tom, why were you _____ from school yesterday? why were you _____ from school yesterday? — I got a bad cold and my mother took me to the doctor's.