洗涤性
参考答案:
低温时,非离子表面活性剂的cmc比离子型的低,非离子表面活性剂的低温洗涤性能好
— Where is your mother?
—She ________ the shop. She’ll be back in an hour.
A.has been to
B.has gone to
C.goes to
D.go to
|x+1|-|2x-3|<0.() (1)x<0; (2)x>3.