Tai Lihua is a Chinese woman. She is very beautiful. As a child, she became deaf and dumb(哑的). She couldn't hear or say. She was very sad. Later, she had a teacher. The teacher taught her to dance. Though she couldn't hear, she was very hard­working. She danced very well. Now, she is very famous. She is not sad any more.

①过点P作PQ∥CD，交AB于点Q；

②过点P作PR⊥CD，垂足为R．

2017年3月5日，***在政府工作报告中提出：今年网络提速降费要迈出更大步伐，年内全部取消手机国内长途和漫游费。这项举措（    ）

①说明我国政府立党为公、执政为民         ②有利于落实以人为本的科学发展观

③有利于减轻我国人民的负担                     ④有利于解决现阶段我国社会的主要矛盾

据药理分析，某种茅草的根内含有降血糖的因子及多种有益健康的成分，某公司将它开发成一种保健饮料．该产品是否适合于糖尿病患者，生物兴趣小组的同学以此作为研究课题．请完成下面的实验鉴定报告．

（1）实验目的：鉴定茅草的根是否含有还原性糖和淀粉

（2）实验原理：还原性糖可用____ 试剂，淀粉可用____ 试剂来检验

（3）实验器材：茅草根、所需各种试剂、刀片、酒精灯、试管夹、滴管

（4）实验步骤：、

①鉴定还原性糖____

②鉴定淀粉____

（5）实验现象____

（6）实验结果____