The middle meningeal artery arise from ()
A. external carotid a.
B. internal carotid a.
C. superficial temporal a.
D. maxillary a.
E. facial a.
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The nerve of controling masseter is ()
A. facial nerve.
B. maxillary nerve.
C. vagus nerve.
D. trigeminal nerve.
E. lingual nerve.
Concerning the carotid sinus, the right description is ()
A. It is a dilatation at the posterior wall of the common carotid artery.
B. It is a dilatation at the point of the bifurcation of the common carotid artery.
C. It is a small ball structure behind the point of division of the common carotid artery.
D. It is a chemoreceptor.
E. All above are wrong.
99% of area under standard normal curve lies between______ of the mean. ()
A. 1 SD
B. 1.96SD
C. 2.58SD
D. 1.64SD
E. 1.28 SD
In paired t test, the Ha should be:()
A. μ=μ0
B. μ≠μ0
C. μ1=μ2
D. μd≠0
E. μd=0
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