试题与答案

下列有关毒蕈碱型受体的描述,哪一项是正确的: A.M受体属离子通道型受体 B.M受体

题型:单项选择题

题目:

下列有关毒蕈碱型受体的描述,哪一项是正确的:

A.M受体属离子通道型受体
B.M受体属G-蛋白偶联受体
C.激动心脏M受体产生兴奋效应
D.哌仑西平能阻断M1和M5受体
E.阿托品仅能阻断M2受体

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析: 由题意知,当月销售收入120000元,上季度该类商品的毛利率为20%,则5月份销售毛利=销售收入×毛利率=120000×20%=24000(元)。则销售成本=销售收入-销售毛利=120000-24000=96000(元)。又知5月...

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题型:阅读理解

阅读理解。

     I'm lying on my back in my grandfather's orchard (果园), looking up at the branches above me. It is one

of the last days of summer. Already the days are shorter and the nights are cooler. Some kinds of apples are

already ripe (成熟的). Others will be ready to pick soon. I think of my grandmother's apple pie (苹果馅饼),

and how I used to make it with her. She died last year, before the apple harvest, and I have not had her pie

since. I really miss her. I hear bees busily humming about, visiting the late summer flowers. The gentle hum

of their wings nearly sends me to sleep.

     The sky is as blue as my grandfather's eyes. Above me, big white clouds race across the sky like pieces

of cotton blowing in the wind. School starts in another week, and time seems to have slowed down.

     "Sophie!" calls my grandfather. "Is that you?" I stand up, take his hand, and tell him all about my day as

we walk through the orchard. We talk about apples, and bees, and Grandma. He tells me that he misses her

too.

     He puts his rough, brown farmer's hand around my shoulder and pulls me close. "You know, Sophie," he

says, "I spent the morning in the attic (阁楼), and you'll never guess what I found. It's the recipe (烹饪法)

for Grandma's apple pie. I used to help her make it sometimes. I can't do it all alone, but you used to help her

too. Maybe between the two of us, we can work it out. Want to try?"

     "But it won't be the same without Grandma," I tell him.

     "That's true," he says, "but nothing is the same without Grandma. Still, I don't think that she would want

us never to have another apple pie. What do you say?" I nod yes, and we walk towards home… towards an

afternoon in the farmhouse kitchen, making Grandma's famous apple pie.

1. We learn from the passage that Sophie _____.[ ]

A. likes to watch clouds in the attic

B. comes to the orchard after school

C. enjoys Grandma's apple pie very much

D. picks many apples in the orchard

2. Both Sophie and her grandfather used to _____.[ ]

A. help Grandma make apple pies

B. spend summer afternoons in the orchard

C. enjoy fresh fruit in the farmhouse kitchen

D. walk alone among the apple trees

3. The underlined part in the last paragraph shows _____. [ ]

A. how much Sophie's grandmother loved Sophie

B. how much Sophie's grandfather likes apple pies

C. how much Sophie loves her grandfather's orchard

D. how much Sophie's grandfather misses Grandma

4. Which of the following might be the best title for the passage?[ ]

A. My grandfather's orchard

B. My grandmother's apple pie

C. A morning in the attic

D. The last days of summer

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