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【单选题】
下列四组物质的分子式或化学式都相同,按物质的分类方法属于同一类物质的是 ( )A.
和CH 2 == =CH—CH 2 CH 2 CH 2 CH 3
B.
正戊烷和新戊烷
C.
CH 3 —O—CH 3 和CH 3 CH 2 OH
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【判断题】The function of qigong is similar to that of t'ai chi in that both of them are aimed at ensuring the smooth flow of qi.
A.
正确
B.
错误
【单选题】Why does the author mention the 'California gold rush'?
A.
To show that clippers were mostly used by those traveling to America.
B.
To try to convince people that clippers worsened people's greed for gold.
C.
To give an example of a situation that made clippers valuable.
D.
To demonstrate why clippers ually fell out of favor with the publi
【判断题】The function of qigong is similar to that of t'ai chi in that both of them are aimed at ensuring the smooth flow of qi.
A.
正确
B.
错误
【单选题】The boy ______ blue trousers______.
A.
with; look cool
B.
in; looks cool
C.
with; looks cool
D.
in; look cool
【简答题】蔗糖是由一分子 和一分子 通过糖苷键而形成的二糖,蔗糖 (填有或无)还原性。
【简答题】n. a flow of cool air in a room or other enclosed space____。
【单选题】When an engine has just started there is no need to cool it, so a thermostat is intended to the flow of water the the radiator.
A.
turn on
B.
turn off
C.
turn into
D.
turn down
【简答题】下列关于执业兽医表述不正确的是( ). A.执业兽医应当定期参加兽医专业知识的教育培训 B.执业兽医包括执业兽医师和助理执业兽医师 C.从事宠物美容的人员属于执业兽医 D.国家鼓励成立兽医行业协会 E.保障执业兽医的合法权益是《执业兽医管理办法》的立法目的之一 参考答案C ##next 8. 报考执业兽医考试的学历要求是( ). A.兽医专业中专以上 B.兽医专业大学专科以上 C.兽医专业大学本科...
【单选题】Why does the author say that even gold and silver were inconvenient if you had to buy something expensive?
A.
Because they are easy to steal.
B.
Because they are difficult for people to obtain.
C.
Because they are not easy to carry around.
D.
Because they themselves are expensive, too.
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