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Passage 8 Hobbies A hobby can be almost anything one likes to do in his spare time. Hobbyists raise animals, build model ships, make baskets, or carve soap figures. They watch birds, hunt animals, climb mountains, raise flowers, fish, and swim. Hobbyists also paint pictures, attend concerts and plays, and perform on musical instruments. They collect everything from books to flowers and from shells to stamps. People like hobbies because these activities offer enjoyment, friendship, knowledge, and rest. Sometimes they even bring money. Hobbies help people rest well after periods of hard work, and provides a balance between work and play. Hobbies also offer interesting activities for persons who retired. Anyone, rich or poor, old or young, sick or well, can follow a satisfying hobby, regardless of his age, position, or income. Hobbies can help a person's mental and physical health. Doctors have found that hobbies are valuable in helping patients recover from physical or mental illness. Hobbies give patients something to do, and provide interest that keeps them from thinking about themselves. People today have more time than ever for their hobbies. More people are retiring than ever before, and at an earlier age. Those who have developed hobbies never need to worry about what to do with their newly-found spare time. Sir William Osler, a famous Canadian doctor, expressed the value of hobbies by saying: "No man is really happy or safe without a hobby." Comprehension of the Text The main idea of the first paragraph is . hobbies are activities enjoyed by people in their spare time hobbies vary in interest and enjoyment for different people people should take up several hobbies at a time some hobbies are more interesting than others Based on the passage we know that hobbies . can give people longer periods of rest offer sound sleep for the retired persons can be used as a medical treatment present people with more play and less work 3. We can safely say from the passage that ____. A) a person should have hobbies one at a time B) hobbies are something instructive C) almost every doctor has one hobby D) life would be different if one has a hobby 4. What can be said of the passage? A) It's easy to develop an instructive hobby. B) Hobby can cure serious illness. C) Even a child can have his own hobby. D) Hobbies can bring about nothing but spiritual benefits. 5. The author writes the passage to . A) show the advantages of hobbies over work B ) praise those who have hobbies C) ask patients to treat themselves with hobbies D) encourage people to develop hobbies
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【单选题】[1811第9题]:某计算机系统中互斥资源R的可用数为8,系统中有3个进程P1、P2和P3竞争R,且每个进程都需要i个R,该系统可能会发生死锁的最小i值为()。
A.
1
B.
2
C.
3
D.
4
【简答题】“墙”这个象征意象象征了诗人什么样的人格精神?
【单选题】某计算机系统中有3个进程P1、P2和P3,3类资源r1、r2和r3。其中r1和r3每类资源只有1个,r2资源有2个,如图1所示。系统当前的资源分配如下: E={(P1,r1),(P2,r3),(r2,P1),(r1,P2),(r2,P2),(r3,P3)} 如果进程P3申请一个r2类资源,那么系统进入下列哪一种状态?
A.
饥饿
B.
活锁
C.
无死锁
D.
死锁
【判断题】定序就是确定汉字的书写笔画顺序标准。()
A.
正确
B.
错误
【单选题】下面的字,书写笔画顺序不正确的一个是
A.
B.
C.
D.
【单选题】关于“声音”功能,以下说法正确的是( )。
A.
Scratch 可以识别所有的音频文件格式。
B.
“停止所有的声音”代码块会立刻停止播放所有的声音。
C.
“播放声音”代码块必须要等到音乐全部播放完毕才能执行后面的代码。
D.
“播放声音等待播完”代码块在声音开始播放后就立刻执行后面的代码。
【多选题】关于在幻灯片中插入音频的操作,下列说法正确的是( )。
A.
插入声音的操作包括插入“PC上的音频”和“录制音频”
B.
在幻灯片中插入声音后,当前幻灯片中会出现一个声音图标,选择该图标可对声音进行编辑
C.
通过“动画”功能组执行插入声音的操作
D.
通过【播放】/【音频选项】组可对声音播放方式进行设置
【简答题】Please preview Text B in Unit 6 and ask one question about what you don't understand.
【简答题】某计算机系统有3个进程P1、P2和P3,4类资源r1、r2、r3和r4。其中r1和r3每类资源只有1个实例,r2资源有2个实例,r4有3个实例。 当前的资源分配状态如下: E={ , , , , , } 若进程P3申请一个r4类资源 ,则系统可能会发生下列哪一种现象? A.A.死锁 B.B.无死锁 C.C.活锁 D.D.饥饿
【简答题】据图回答问题: (1)当终产物谷氨酸合成过量时往往会导致合成途径中断,原因是谷氨酸抑制了____的活性,这属于____调节。它 ____级代谢产物,它合成后的存在部位是____ 假设B酶只有细胞内出现某种中间产物后才能合成,则B酶是一种____。 (2)假设人们想利用葡萄糖、谷氨酸棒状杆菌生产a-酮戊二酸,请你利用现有的知识,设计一个大量积累a-酮戊二酸的方案:____
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