A:与普通的洗衣粉相比,用加酶洗衣粉可以减少N和P对河流的污染
B:加酶洗衣粉中的纤维素酶不能直接去除污垢,但可以增强洗涤效果
C:在“探究不同种类的加酶洗衣粉对同一污渍的洗涤效果”实验中,无关变量温度只要保证一致就不影响实验结果
D:加酶洗衣粉应放在阴凉、干燥处存放,否则可能影响洗涤效果
惠山区教育局大力发展校园足球,全区中小学普及足球教学,如图,某学生踢球时,同时____也受到球的作用力,这一事例说明____,球被踢出后,在空中飞行的过程中所受力的施力物体是____.(不计空气阻力)
- Our head teacher is responsible for his work. He spends most of his time with us.
- ________ He always communicates with our parents in his free time.