爆破或突然发生的巨响所致耳聋，属何种类型听力损伤 （） A.听觉适应 B.听觉疲劳

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     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 thought 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.

复元活血汤的功用是（）

A．活血祛瘀，行气止痛 

B．活血祛瘀，温经止痛 

C．活血祛瘀，通络止痛 

D．活血祛瘀，疏肝通络 

E．活血祛瘀，凉血止痛

韩国首尔大学科学家将水置于一个足够强的电场中，在20℃时，水分子瞬间凝固形成“暖冰”。下列关于“暖冰”的说法中不正确的是 [ ]

A．“暖冰”也是水分子间通过氢键结合而成的固体

B．水凝固形成20℃时的“暖冰”所发生的变化是化学变化

C．水凝固形成20℃时的“暖冰”所发生的变化是物理变化

D．在电场作用下，水分子间更易形成氢键，因而可以制得“暖冰”

阅兵的权限是怎样规定的？

木枕与混凝土宽枕之间，应用混凝土枕过渡，其长度不得小于（）。

A、15m

B、25m

C、30m

D、35m