表面活性分子在界面上吸附越多,表面张力值()越大。
A.升高
B.降低
C.先升高再降低
D.先降低再升高
参考答案:B
My daughter is really ________ Weibo these days; she spent hours on it daily.
A.up
B.into
C.onto
D.with
结核杆菌为
A.专性需氧菌
B.微需氧
C.兼性厌氧菌
D.厌氧菌
E.需氧菌和厌氧菌