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【单选题】
光栅的分光原理是由于构成的光栅对不同波长的光有A.
干涉和衍射的作用
B.
衍射的作用
C.
干涉的作用
D.
散射的作用
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举一反三
【单选题】American people regard Abraham Lincoln __ one of the greatest of all American presidents.
A.
in
B.
as
C.
for
D.
about
【单选题】American English has so many _________ because the American people have come from all over the world.
A.
grammar
B.
vocabulary
C.
pronunciations
D.
dialects
【多选题】下列指标中的结构相对指标是
A.
集体所有制企业职工数占全国全部职工总数的比重
B.
某工业产品产量比上年增长的百分比
C.
大学生占全部学生的比重
D.
某年积累额占国民收的比重 （国民收入分为消费额和累积额两部分）
E.
某年人均消费额
【简答题】5日,用银行存款支付下半年报纸杂志订阅费3 000元。
【单选题】Goal of American Education Education is all enormous and expensive part of American life. Its size is matched by its variety. Differences in American schools compared with those found in the majority ...
A.
To teach every learner some practical skills.
B.
To provide every learner with rich knowledge.
C.
To give every student the opportunity to fully develop his/her ability.
D.
To train every student to be a responsible citizen.
【单选题】下列指标中的结构相对指标是
A.
2016年国民收入的积累率为18.4%
B.
2016年的人口密度为103人/平方公里
C.
2016年的手表产量比2015年增长43%
D.
2016年某地国有工业总产值比集体工业总产值大2.45倍
【单选题】The passage is mainly about______.
A.
the over-all pattern of American government
B.
American governments at county level
C.
American board of commissioners
D.
American city districts
【单选题】We often provide our children with toys, footballs or basketballs, ______ that all children like these things.
A.
thinking
B.
think
C.
to think
D.
thought
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