When assessing the fetal heart rate tracing, the nurse becomes concerned about the fetal heart rate pattern. In response to the loss of variability, the nurse repositions the client to her left side and administers oxygen. These actions are likely to improve which of the following

A. Fetal hypoxia.
B. Maternal comfort.
C. The contraction pattern.
D. The status of a trapped cor

列车技术作业过程，按其作业性质不同，可分为无调中转列车、到达解体列车、始发编组列车和（）技术作业过程四种。

A.客运列车

B.部分改编列车

C.中转车

D.货物作业车