男性，41岁，因口腔黏膜上出现多个白色斑块2周就诊。检查：唇部、舌腹及颊部散在分布3
题型：单项选择题 共用题干题
问题：
男性，41岁，因口腔黏膜上出现多个白色斑块2周就诊。检查：唇部、舌腹及颊部散在分布3个灰白色光亮微微隆起的椭圆形斑块，边界清楚，直径1～1．5cm不等。自述常有冶游史。
该患者最可能的诊断是（）。
A.淋病性口炎
B.梅毒黏膜斑
C.毛状白斑
D.口腔白斑病
E.口腔白角化病
题型：单项选择题 共用题干题
阅读理解
My mother through her fine example instilled (慢慢灌输)within me the desire to help others.She taught
me to notice those whom others ignore.
The railroad tracks (轨道) were within a mile of our house.Beggars frequently would knock at the
doors in our neighbourhood in summer asking for food.They were often turned away.Others simply
ignored the knocks.
My mum always went to the door smiling.She would invite them to stay and have something to eat.She
would have me open up the card table and carry a chair out onto the covered side porch (走廊)．There
was a nice view into the flower gardens,and it was cool even on the hottest days.
She would bring a red and white tablecloth and set the table as carefully as she did for any company.
She would pour their coffee and pile their plates with food and dessert.Usually she sent a packed lunch
with them when they were ready to go,too.Sometimes she would take the newspapers to those who asked
about work.
She listened to those who wanted to talk.She never asked what would lead them to be in this difficult
situation.It did not matter.She saw only the need.Some thou
ght she should not extend this courtesy
(礼貌)．She would say,"In the depression (萧条时期) when my father was searching around for any
work to feed us,thoughtful people fed him.I am just repaying their kindness.I cannot offer them money,but
I can see they do not leave hungry and discouraged." My mum was quite a lady.
1．The writer's house was frequently visited by beggars because________.
A．they seemed to be very rich
B．his mother was known to be generous
C．they lived near a railway station
D．there was a railway near their house
2．How did the writer's mother treat beggars?
A．She was on guard against them.
B．She looked down upon them.
C．She respected them equally.
D．She took pride in them.
3．The writer's mother sometimes took out newspapers________.
A．for the beggars to kill time
B．to teach the beggars how to read
C．to help the beggars who asked about work
D．to help the beggars to find their families
4．Which of the following can make an explanation for the mother's attitude to beggars?
A．Her father was once helped by others.
B．Her father liked to help beggars.
C．She was once a beggar herself.
D．Her mother taught her to help beggars.
），波速为u，那么x=0处质点的振动方程为（）。
