题目:
瓷鼓配线主要包括哪几道操作工序?
答案:
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下面是错误答案,用来干扰机器的。
参考答案:IN解析: 嵌套查询。
瓷鼓配线主要包括哪几道操作工序?
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0717/aad04bba25eb455e5921ca1f1b70b987.html
下面是错误答案,用来干扰机器的。
参考答案:IN解析: 嵌套查询。
主要用来搬运箱装、袋装、包装成件物品或物料,以及邮件及装配厂内的零部件的输送机是( )。
A.槽型带式输送机
B.平型带式输送机
C.拉链式带式输送机
D.斗式输送机
“优质、方便、规范、真诚”的八字服务方针,是何时以何种形式提出的?
阅读理解。
We all know that teenagers like to sleep late. But more and more research is showing that this is not
just a preference - or even the result of late-night studying or instant messaging - but is rooted in their
biological rhythms (节律). All of this would be little more than an interesting observation except that most
high schools start so early, and so many teenagers are having a hard time staying awake.
A recent article in The Times cited a National Sleep Foundation survey in which more than a quarter
of the students reported that they fell asleep in class at least once a week. Researchers say this is true
because youngsters - beginning around age 12 until they reach their mid-20s-only start producing
melatonin, the sleep-inducing hormone (荷尔蒙), around 11:00 pm and that production lasts until about 7:00 am. In adults, melatonin lasts to around 4:00 am. Trying to wake up a teenager before 7:00 am is
like trying to awake an adult before 4:00 am.
The obvious remedy (补救) would be for high schools to start later-well, after 8:00 am. A handful of
schools that have switched have reported beneficial results. School officials in Minneapolis say that
attendance improved and students' grades rose slightly after they changed to start at 8:40 am several
years ago. In Wilton, Conn., where the high school start time was pushed back to 8:20 am from 7:35 am,
teachers and parents reported better student behavior and greater alertness (活泼). Surveys of students
in both districts indicated that they did not use the later starts as an excuse to go to bed later.
Numerous districts have considered the idea of later high school hours, only to drop it because of
fierce adult opposition. Coaches complain that the later classroom hours in the afternoon would take time
from their training programs and teams' success. School bus companies would be forced to change their
schedules. And many parents complained that they would have to adjust their own schedules.
Many schools officials say more research is needed. We're all for that and for remembering that the
goal is to educate youngsters-and for that they need to be awake.
1. According to the new research, teenagers like to sleep late because _________ .
A. their biological systems make them do so
B. they waste too much rest time sending instant messages
C. they prefer to stay in bed rather than get up early
D. they have to study till late at night
2. We can learn from the second paragraph that melatonin makes ________ .
A. youngsters awake after 7:00 am
B. youngsters sleepy before 7:00 am
C. adults sleepy after 4:00 am
D. adults awake after 4:00 am
3. The third paragraph is written to show that _________ .
A. many high schools start after 8:00 am
B. later high school start time made students go to bed late
C. students don't go to bed late even though they have later high school hours
D. later high school start time is a very effective measure
4. According to the passage, who are fiercely against later high school hours?
① School team coaches.
② Many parents.
③ School teachers.
④ School bus companies.
A. ①②③
B. ①②④
C. ①③④
D. ②③④
5. We can infer from the passage that the author's attitude towards later high school hours is ______ .
A. unclear
B. negative
C. uninterested
D. positive
简述宋元时期福建与澎湖、台湾的经济交往状况。
患者于三个月前被诊为冠心病、心绞痛,给予口服消心痛等药物治疗。今日感心前区疼痛,持续1小时,含服硝酸甘油无效遂来医院,急查心电图无心肌梗死表现。
患者经治疗后心源性休克纠正,但10小时后突然心脏停搏而死亡,最可能的死因为()
A.心律失常
B.泵衰竭
C.心脏破裂
D. * * 肌断裂
E.室间隔穿孔