已知∆ABC中,a=20,b=29,c=21,求∠B=( )
A. 60°
B. 45°
C. 90°
D. 120°
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A newborn baby needs _____________ care and attention.
A. constancy
B. constant
C. contain
D. constrain
These large companies ___________ considerable infl uence over the government.
A. exit
B. exert
C. exist
D. existing
Winning the championship was a / an _______________ feeling.
A. increased
B. Incredible
C. indifferent
D. differ
Tension here is ____________, as we await the final result.
A. amount
B. Mounting
C. mountain
D. hill