下列验证某种加酶洗衣粉,需要的最适温度实验正确的是 ( ) A .取一系列不同温度、其他条件相同的水。加入相同的污物及等量加酶洗衣粉,看哪一个温度中酶的效果最好 B .在不同温度的水中,加入不等量洗衣粉。看哪种效果好 C .将加酶洗衣粉加入 30 °C 水中发现不如在 45 °C 的水中洗涤效果好,说明 45 °C 为最适温度 D .将加酶洗衣粉与普通洗衣粉分别加入 37 °C 的水中洗涤同样的污物,发现加酶洗衣粉效果好,说明加酶洗衣粉的最适温度为 37 °C
【简答题】Two agers had to be saved from a steep mountainside in Scotland earlier today. They were members of a party of youngsters who were in the second week of a fortnight’s camping in the mountain. The ...
【简答题】After lunch, without permission from parents, the two boys set off to explore the part of the beach which lay beyond the headland(陆岬,伸出海面的尖形高地).They had persuaded their young sister to _1_, saying tha...