微生物传感器快速测定法测定生化需氧量时,如果采集到的水样温度过低,应迅速升温至20度,充分振摇,以赶出过饱和溶解氧。
参考答案:对
在下列有关MRI图像截断伪影的扫描,错误的是()
A.截断伪影通常出现在高对比组织的界面
B.截断伪影通常表现为交替的亮带与暗带状伪影
C.在傅立叶变换前对信号滤过,可减少截断伪影
D.增大矩阵可减少截断伪影
E.增大FOV能减少截断伪影
The wise parents can tell whether their children are telling the truth __________ they listen
to their excuses to wrong deeds. [ ]
A. the first time
B.for the first time
C.every time
D. for every time