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问题 单项选择题

下列不属于SI基本单位的是( )。

A．m

B．A

C．cd

D．V

答案

参考答案：D

解析：SI基本单位共7个，它们是构成SI的基础。分别是：长度单位(米)m、电流单位(安培)A、发光强度单位(坎德拉)cd、物质的量(摩尔)mol、质量单位(千克[公斤])kg、时间单位(秒)s、热力学温度(开尔文)K。

单项选择题

I am Steve. I was born and grew up in South Wales. My favorite place to play was out on the hills where my imagination had plenty of space to expand.
My family moved out of Wales when I was thirteen. I went to a new school. One of my subjects was French. Because I had never learned any French, my teacher told me to sit in the corner and write anything I was interested in. That’s the time I started writing, just for myself, and I’ve been writing ever since.
I have always loved BIG IDEAS, and so I enjoy writing fantastic stories. And I also write horror stories. I think they are like the old fairy tales, and can teach you important things.
I am in my forties on the outside, twelve on the inside. I like rock music, Indian and Chinese food, and I enjoy drinking. I live in a small village with my wife Mary, ducks, cats, oats, hens and lots of rabbits. If you’d like to find out more about me and hope to buy my books, go to www.sbowkett.freeserve.co.uk.

When he was 13, the writer ______.

A．wrote lots of poems
B．moved out of Wales
C．sold many story books
D．became a famous singer
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单项选择题

最终合同付款。在设备保证期截止时，在卖方提供相关文件和单证后，买方支付合同价的尾款，一般为合同总价的( )。

A．5%
B．7%
C．10%
D．15%
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