对于戊型肝炎，以下哪一项是错误的（） A.其病原体为HEV B.以粪-口传播途径为主

短文改错 (共10小题；每小题1分，满分10分)

It’s well known which Wilma Rudolph is the first American woman  76. _____

to have won three Olympic gold medal in track! However, when     77. _____

she was young, she was sick most of the time. At four, he couldn’t     78. _____

move her left leg as a result of a serious illness. Followed the      79. _____

doctor’s advice, her mother rubbed her sick leg every day and take  80. _____

her to the hospital once a week. After a year, Wilma could manage     81. _____

a sort of jump. At eight, she was walking a bit at the aid of a      82. _____

walking stick. Soon she was out in the yard playing the basketball.  83. _____

Her mother was surprising to see that. Little by little,        84. _____

Wilma became famous as a track star but won medals.        85. _____

果园农艺师通过人工授粉，将毛桃的花粉授到未授粉的水蜜桃花柱头上，结出的桃子味道是（　　）

A．毛桃味

B．水蜜桃味

C．两种口味均有

D．以上都不对

做竖直上抛运动的物体，在上升到某一高度时，势能的改变量为ΔE_p，动能的改变量为ΔE_k,物体克服重力做功为W_G，物体克服空气阻力做功为W_f，则下列表达式中正确的是(    )

A．ΔE_k=ΔE_p+W_G+W_f

B．ΔE_k=ΔE_p-W_G-W_f

C．ΔE_k=-(ΔE_p+W_f)

D．ΔE_k=W_G-W_f

骨肉瘤的好发年龄是（）

A.15岁以下

B.15～25岁

C.20～40岁

D.婴幼儿

E.40岁以上

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