桥上测流的主要设备就是配置的桥测车，配置的桥测车应具有（）的功能。
A.强机动性
B.测速测深
C.卫星导航
D.野外生活
参考答案：B
A community nurse visits a family living in a rural area where the drinking water is not fluoridated. Which of the following would the nurse suggest to the family as the most appropriate means for obtaining a significant amount of fluoride
A. Tea.B. Yogurt.C. Citrus juices.D. Natural cheeses.
抗癌药物对骨髓的抑制作用与血细胞半寿期有关，红细胞的半寿期为（）
A.120d
B.100d
C.80d
D.60d
E.40d
