用发酵法制备的是()
A.生半夏
B.姜半夏
C.清半夏
D.法半夏
E.半夏曲
参考答案:E
已知集合A={y|y=ln(x2+1),x∈R},则CRA=( )
A.∅
B.(-∞,0]
C.(-∞,0)
D.[0,+∞)
There will be _____ jobs for people in the future, because more robots will do the same jobs as people.
A. many B. less C. fewer