社会保健服务的重点人群是
A．急、重症病人B．妇女、儿童、老人C．老年人及其家属D．临终病人及其家属E．所有社区人群
参考答案：B
在下列各句的空白处填入一个最恰当的单词，使句子意思完整，语法正确。
1. It's a teacher's_________to teach the students well.
2. You shouldn't worry about your problems. You should_________the challenges instead.
3. Worrying about our problems can also_________the way we behave with our families.
4. Tom and I are good friends. I hope our_________will last long.
5. All the villagers are looking for the_________boy in the mountains.
6. Don't talk_________in the classroom. The students are studying.
淡水白鲳源于（）
A.尼罗河
B.亚马逊河
C.黄河
D.密西西比河
