A typical title for academic paper is composed of keywords of methods, keywords of content and ().
A、keywords
B、introduction
C、subject matter
D、conclusion
A、keywords
B、introduction
C、subject matter
D、conclusion
Muscles are bundles of fibers varying from one five-thousandth of an inch to about three inches.They have three unique characteristics, they can become shorter and thicker; they can stretch; and they can retract to their original positions.Under a high-powered microscope, muscle tissue is seen as long, slender cells with a grainy texture like wood.
More than half of a person's body is composed of muscle fibers, most of which are involuntary-in other words, work without conscious direction.The voluntary muscles, those that we move consciously to perform. particular actions, number more than five hundred.
Women have only 60 to 70 percent as much muscle as men for their body mass.That is why an average woman can't lift as much, throw as far, or hit as hard as an average man.
21.According to the selection, the muscular sense is used for ().
A.the efficiency of our muscles
B.the normal breathing function
C.directing our muscles intelligently
D.the work of only our involuntary muscles
22.Intelligent use of the muscles means that().
A.one always knows what his muscles are doing
B.one performs simple actions without working
C.one's muscles are used only to the extent necessary for each action they perform
D.one improves muscular action consciously
23.Muscles are unique fibers because, they can().
A.contract
B.stretch
C.retract
D.do all of the above
24.Under a microscope, muscle cells appear to be().
A.textured like wood
B.colored like wood
C.smooth and red
D.short and thick
25.According to the selection more than half of a person's body is composed of().
A.voluntary muscles
B.involuntary muscles
C.muscle fibers
D.sensory nerves
B.offering detailed information about the event
C.asking for confirmation
D.all of the above
A、ethical marketing
B、volunteering service
C、community involvement
D、ethical labor practices
A、a sweet tongue
B、a bitter tongue
C、sweet teeth
D、sharp teeth
A、by
B、with
C、as
D、for
A、senstences
B、words
C、phrases
D、paragraphs
A、discuss the newest research state
B、tell the readers the state of scholarship about a given topic
C、analyze the current state of the research area
D、organize and evaluate the major points or arguments of each source
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