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问题 问答题

一块金属体积是20cm3，质量是 178g．求它的密度是多少？

答案

金属块的密度：

ρ=

m
V
=
178g
20cm3
=8.9g/cm3．

答：该金属块的密度为8.9g/cm3．

单项选择题

Many students have hobbies, such as reading, painting, growing vegetables in their gardens, and looking after animals. Some hobbies are relaxing and (16) are creative. Hobbies can develop your interests and help you learn new skills.
David Smith is a student, and his hobby is writing. (17) the sumer of 2000, he spent four weeks on a summer camp. As well as the usual activities, such as sailing, climbing and mountain biking, there was a writing workshop with a professional (18) "She asked us to imagine that we were in a story. Then we wrote about our (19) at the camp. "
In senior high school David wrote a story about teenage life, and it (20) as a book in 2003. Many teenagers love his book, and as a result, David has become a (21) young writer.
David has been very lucky (22) his hobby has brought him enjoyment and success, but he is (23) interested in many other things. "I like playing volleyball, too" says David. "I spend some of my free time playing volleyball for my school team. (24) I’ll write more books in the future, but I’m not sure. "
It’s sometimes difficult (25) that we shouldn’t spend all our time on our favourite hobby. There are many other interesting things to do in life, and we should try to do something new or different.

Ⅱ. 完形填空/Cloze

A．During

B．At

C．For

D．On
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单项选择题

授权的四种类型都有哪些（）

A.直接授权的工作、应该授权的工作、可以授权的工作、不应授权的工作

B.必须授权的工作、应该授权的工作、可以授权的工作、不可以授权的工作

C.不必要授权的工作、应该授权的工作、可以授权的工作、不应授权的工作

D.必须授权的工作、应该授权的工作、可以授权的工作、不应授权的工作
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