楼梯平台宽度供单人通过时应不小于( )A．650mm B．750mm C．850m

阅读理解。

     Tom is my classmate. We have very different eating habits. My diet (饮食) is healthy but his is not. For

  breakfast, I have a glass of milk, some bread and an egg. Tom has a cup of coffee, some sausages and

 an egg. I take a lunch box to school every day. In my lunch box, I have meat or fish, rice and vegetables. I

  also have an apple or an orange. But Tom usually has a hamburger and French fries, or a pizza (比萨饼)

 and chicken for lunch. If I'm hungry between meals, I have some more fruit, but Tom eats sweets, chips,

 chocolate and cakes. When I'm thirsty (口渴的), I like drinking water, but Tom likes to drink cola. I don't

  eat much for supper, but Tom eats a lot. So I'm fit, but he is overweight (超重的). 

1. The writer and Tom _____ eating habits.

    A.both have healthy

    B. both have unhealthy

    C. have different

    D. want to change their

2. The writer and Tom both have _____ for their breakfast.

    A. an egg

    B. milk

    C. bread

    D. coffee

3. Tom usually _____ for lunch.

    A. takes a lunch box

    B. has no healthy food

    C. has some fruit

    D. doesn't have French fries

4. The writer _____ between meals.

    A. never eats anything

    B. eats fruit every day

    C. often eats sweets

    D. sometimes has some fruit

5. Tom like to have _____ when he is thirsty.

    A. cola

    B. water

    C. fruit

    D. coffee

关于嵌顿疝与绞窄疝的鉴别诊断，最重要的是（）

A.有无呕吐、发热、休克

B.疝内容物有无压痛

C.疝内容物不能还纳的时间

D.疝内容物有无血液循环障碍

E.有无肠梗阻

用如图所示的水壶提水时，手应提在水壶把手的________处 （选填“A”或“B”，下同）；把水壶里的水灌到保温瓶中去时， 应提在水壶把手的________处。出现这样的差别主要是因为力的三要素中力的_________不同所导致的。

化合物物质不包括（）。

A、Fe₃C

B、CuZn

C、CuAl₂

D、石墨

周围神经损伤，感觉障碍表现为（）。

A.传导束性感觉障碍

B.节断性感觉障碍

C.偏身性感觉障碍

D.交叉性感觉障碍

E.末梢性感觉障碍