According to the information in the third paragraph, which of the following improvements m
A.The introduction of pedals
B.The use of heavy wires
C.The use of felt-padded hammerhead's
D.The metal frame. construction
A.The introduction of pedals
B.The use of heavy wires
C.The use of felt-padded hammerhead's
D.The metal frame. construction
According to Brooks Jackson,all campaign slogans are
A. attractive.
B. impressive.
C. informative.
D. deceptive.
According to the passage, sloppy writing ______.
A.parallels a social tendency of being informal
B.worries students as well as professors
C.is taken as trivial by employers
D.is ignored in all business concerned sciences
A.lb=[0;-inf];ub=[inf;inf]
B.lb=[-inf;0];ub=[inf;inf]
C.lb=[-inf;-inf];ub=[inf;0]
D.lb=[-inf;-inf];ub=[0;inf]
设f(x)在[0,1]上连续且f(x)≥a>0,
试证 ∫01Inf(x)dx≤Inf∫01f(x)dx.
He would promise that they would_____in some sphere of society.
A.be influenced
B.become influenced
C.become influential
D.influential
A.She will do the jobs for him.
B.She will inform. him of what he missed.
C.She will inform. him of the dates.
D.She doesn't think they have been doing that much to be concerned.