Levey-Jenning是实验室常用的一种质控图，在图中，X轴一般为_______，Y轴一般为_______。
参考答案：时间或分析批的批号；测定值
用所给词的适当形式填空。
1. We need _____ (wear) warm clothes in winter.
2. There_____ (be)a little water in the glass.
3. Who is the _____ (good) in English in your class?
4. Jim is now' much _____ (happy) than he was one year ago.
5. The students are very_____ (busy) now. They_____ (have) an exam next week.
在观察不同刺激强度刺激神经对肌肉收缩影响时，刺激模式为（）.
A.双次
B.连续单次
C.单次
D.1Hz
