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问题 解答题
有两个小数：a=
0.00…0105
1994个0
，b=
0.00…019
1996个0
．求a+b，a-b，a×b，a÷b．
答案

根据题意，可知a是小数点后有1994+2-1=1995位的小数，b是小数点后有1996+2-1=1997位的小数，那么把a与b的小数点向右移动1997位，那么a就成了10500，b就成了19，；

因为，10500+19=10519，10500-19=10481，10500×19=199500，10500÷19=552

12
19
；

所以，a+b的结果是10519的小数点向左移动1997位；a-b的结果是10481的小数点向左移动1997位；a×b的结果是199500的小数点向左移动1997×2=3994位；a÷b根据被除数与除数同时扩大相同的倍数（0除外），商不变，可以得出就是10500÷19的结果．

所以答案是：

单项选择题

Questions from 31 to 35 are based on the following passage: A garment label is more than just a piece of fabric. It is something that draws the attention of customers to the garment. In today’s times, labels actually help in selling a garment. Customers decide whether to buy a piece of apparel or not on the basis of its label. Labels communicate to the customer what types of materials have been used in making the garment. Different manufacturers use their own special type of labels to create their own distinct identity. A label might be custom-made by a manufacturer to make it unique. Beautiful, customized labels add to the beauty and style of the garment.Each brand produced by the manufacturer is usually distinguishable on the basis of a special symbol, color or word. This is reflected through the label. Garment labels can be made using several fabrics, in different types of finishes and can be attached to the garment in different styles. The fabrics that are commonly used in the preparation of labels are satin, damask, semi-damask and taffeta. In some cases, cotton, canvas and felt are also used in making labels. Satin is the most used fabric in preparing labels. Leather labels are generally used in case of jeans and pants. PVC labels are used in pants and bags. Satin is soft on the skin and looks very pretty initially. However, it is not one of the best fabrics to be used in labels because it is very thin and can snag easily. Labels made using taffeta are stiffer than those of satin and do not snag as easily. However, taffeta labels can irritate the skin of the customers. Damask and semi-damask are ideal fabrics for making labels. Damask labels are soft even after finishing and do not cause any irritation to the customer. Semi-damask is similar to damask in feel, but it costs lesser than damask.

According to the passage, which statement is NOT true（）

A．A garment label has been a “spokesman” for the certain brand.

B．Nowadays, labels have been one of the most influentially decisive factors in the customer’s purchasing performance.

C．A unique label adds to the beauty and attraction of the garment.

D．Labels are somewhat more important than the garments.
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单项选择题

索马里海流是印度洋的一支特殊西边界流，其带来冷海水，对近海生产力有重要影响。它只存在于（）季，与季风有密切关系。

A、春

B、夏

C、秋

D、冬
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