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【单选题】
对不熟悉的参观游览点,地陪最好在带团前进行准备工作,必要时可以()。A.
提前进行踩线
B.
在带团时人询问
C.
按照地图带领游客参观
D.
向景区工作人员询问
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which of the following is NOT true?
A.
The author most probably was an immigrant from Asia and received some school education there.
B.
Buenos Aires must be the name of a city, as are Kabul and Karachi.
C.
Children in other countries are not likely to learn creative geography.
D.
The knowledge of geography of the author's son shows that American education is poor.
【单选题】It can be inferred from the second paragraph that______.
A.
various immigrant flows will help the promotion of English language
B.
an abrupt stop in Mexican immigration is around the corner
C.
the sudden stop in legal immigration will often cause a sudden increase in illegal entries
D.
former Congresswoman Barbara Jordan is strongly against Mexican immigration to the US
【单选题】三级式无刷交流发电机的优点是
A.
可靠性差,使用的局限性很大。
B.
发电机的外特性较软,同时在发电机出现三相短路故障时,发电机端电压为零。
C.
励磁可靠
D.
主发电机输出短路时，具有强励磁能力。
E.
一旦飞机上直流电源失效，势必导致整个交流电源系统没电
F.
带有电刷和滑环，容易产生火花，工作条件受到限制
G.
调压器损耗功率较大，发热严重，需要专门通风冷却等。
【简答题】直流电机火花等级有几级，如何根据换向器及电刷的状态判断3级火花？
【单选题】It can be learned from the text that minority and immigrant women______.
A.
had many choices to make when competing for a job in America
B.
had suffered great economic hardship in competing for a job
C.
had no alternative jobs to take for the severe competition
D.
had to compete for a seat instead of a house-cleaning job
【单选题】Which of the following is NOT true about Carnegie?
A.
He was an immigrant from England.
B.
He worked on the railroad at a time.
C.
He spent time in writing.
D.
He was a philanthropist.
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