下列职责中，( )岗位是不相容职责。A．电算化主管与审核 B．凭证录入与修改 C．

一个角的度数比较小，只有3°，为了看清楚些，用一放大倍数为5倍的放大镜观察，可以看到这个角的度数为（　　）

A．5°

B．15°

C．3°

D．30°

_____, I've caught up with my classmates in my English study. [ ]

A. Under his help

B. With him help

C. Under the help of him

D. With the help of him

A pregnant client is taking folic acid. During prenatal teaching, which of the following foods would the nurse recommend as high in folic acid ？（）

A．Egg yolks.

B．Fruit.

C．Bread.

D．Milk.

某厚度h=15m的含水层，两口观测井(距离200m)，测得1号井水位64.22m，2号井水位63.44m，土层渗透系数k=45m/d，试求含水层单位宽度的渗流量。

与增感屏降低影像清晰度原因无关的是

A．荧光体的光扩散

B．荧光体种类

C．荧光交迭效应

D．X线斜射效应

E．增感屏与胶片的密着状态