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在透镜对光作用的实验中：拿一个凸透镜______着太阳光，再把一张硬纸板放在它的另一侧，改变透镜与纸的距离，直到纸上的光斑变得______，测出光斑到透镜的距离，这就是______．

答案

凸透镜对光线有会聚的作用；拿一个凸透镜正对着太阳光，直到纸上的光斑变得最小、最亮，这个最小、最亮的光斑就是该凸透镜焦点的位置，焦点到透镜光心的距离就是焦距．

故答案为：正对；最小、最亮；焦距．

多项选择题

己注册会计师负责对F公司20×8年度财务报表进行审计。在编制和归档审计工作底稿时，己注册会计师遇到下列事项，请代为做出正确的专业判断。

根据审计准则的规定，在确定审计工作底稿的格式、要素和范围时，注册会计师应当考虑的因素有( )。

A．在执行审计工作和评价审计结果时需要做出判断的程度

B．已识别的例外事项的性质和范围

C．使用的审计方法和工具

D．已经识别的重大错报风险
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根据表格内容，选择正确答案。
Name
Age
Name
Age
Alice
35
Maria
26
    I like shopping, but shopping with young
children is not an easy thing, I have to look
after them when I go shopping with my
husband only when I buy something for him,
When I look at a cheap dress, he always says,
"It's beautiful on you," But when I have an
expensive one in my hands, he always says,
"I don't think it fits you well," So I often go
shopping with my friends, It's fun. I like
shopping alone, too. 		   I like shopping very much, but I never go
shopping at the weekends. There are too many
people in shops. I don't like shopping with
other people, It usually because I never buy
them when I first see them. I always look
around other shops to find the same thing
but cheaper. I'm good at finding cheap things.
I don't like buying food in small shops or street
markets. I think food in supermarket is fresh
and cheap.
1. Both Alice and Maria like shopping             .
[ ]
A. with friends
B. alone
C. at the weekends
D. on weekdays
2. Alice's husband says. "I don't think it fits you well." He means "            ". 
[ ]
A. The dress is not suitable for you
B. It is large on you
C. It is too expensive
D. It is small on you
3. Why does it take Maria much time to buy things?
[ ]
A. Because she doesn't really like shopping
B. Because there are too many people in the shop
C. Because she wants to find the same thing cheaper
D. Because she like buying expensive things
4. We can learn from Maria's words that              .
[ ]
A. many people like shopping at the weekends
B. things are cheaper at the weekends
C. people don't like shopping at the weekends
D. she sometimes goes shopping at the weekends
5. Maria likes to buy food             . 
[ ]
A. in small shops
B. in supermarkets
C. in streets
D. in street markets
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