单词拼写(每题1分，共10分)

71.The prices of the dolls r_______ （从……到…….变化）from $5 to $100.

72.The hospital is __________ （位于）in the centre of the city.

73.The wheel in the Indian flag is a __________(象征 )of peace.

74.His daughter is being ____________(教育)in England now.

75.The teachers are___________ (鼓励)the students to help each other.

76.We’ll buy some _________(家具)for our new house.

77.The crops were ___________(毁掉)by the late frost.

78.---Would you like to help me?

-----_________(当然)!

79.We can _______ (适应)to the new life quickly.

80.Is it __________(方便的) for you to come here tomorrow?

关于血管扩张药降压的机制可能正确的是（）

A.直接舒张血管平滑肌

B.阻断了体内神经递质对血管壁上受体的作用，从而使血管扩张

C.改变离子通道特性导致血管舒张

D.改变中枢神经系统的功能使血管扩张

E.内在拟交感活性，兴奋外周β受体