加酶洗衣粉是指含有酶制剂的洗衣粉。请回答下列问题：
(1)由下图推知，该实验的目的是_____________。50℃时加酶洗衣粉中碱性蛋白酶的最适含量是____。
(2)下表是添加脂肪酶的加酶洗衣粉和普通洗衣粉洗涤效果的实验记录，请据表回答：
①．该实验设计体现了__________原则。
②．若实验组1号洗净所需时间接近7分钟，最可能的原因是___________。
(3)下列衣料不适宜用添加蛋白酶的加酶洗衣粉洗涤的有_________。
①棉织品 ②毛织品 ③腈纶织品 ④蚕丝织品
(4)根据以上实验结果，写出两项提高加酶洗衣粉洗涤效果的措施：______________________。
(1)探究温度、碱性蛋白酶含量(浓度)对去污力的影响 0.6
(2)①．对照、单一变量 ②．酶失活
(3)②④
(4)用温水浸泡、延长浸泡时间、增加洗衣粉的用量等(写出两项合理答案即可)
My friends and I had just finished lunch at a hotel when it started to pour 1 . When it became lighter, I decided to get my car, which was 2 at my office three streets away. My friends argued that I shouldn’t go, mainly because I was seven months pregnant then. I assured them that I’d be very 3 . I walked out of the 4 and started making my way to the car. At the traffic junction, a van stopped and the passenger got off with an umbrella. Before I knew what was happening, he walked right beside me and told me he’d escort(护送) me to my 5 . I was very embarrassed and declined(辞谢), but he was very 6 . During our 7 , he kept telling me to walk slower, as the ground was 8 . When we got to the car park, I 9 him and we parted ways. I did not get his 10 and may not even recognise him now. Did he 11 stop for me? I’ll never know. So how did I pay it forward? I was at home when I 12 two Indian construction workers walking in the heavy rain. They were probably on their way to the construction 13 near my estate, which was a long walk in. I went out and passed them an umbrella. I told them they should take the umbrella and 14 it. They were very grateful and like me, probably wondered why a 15 was offering such kindness.
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