感觉适应是指由于强刺激的持续作用而引起的感受性（）的现象。
A.不变
B.提高
C.降低
D.消失
参考答案：B
—How long has Henry’s father_______?—About two months.
A. bought the car B. been dead C. joined the club
已知双侧t0.05=3.182，理论上95%的 t值落在
A．(3.182，+∞)
B．(0，+3.182)
C．(-∞，+3.182)
D．(-3.182，+3.182)
E．(-3.182，+∞)
