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【单选题】
造成粉尘进一步扩散，污染车间空气环境的主要原因是（）A.
．一次气流
B.
．二次气流
C.
．尘化气流
D.
．室外气流
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反馈参考答案：
举一反三
【单选题】American Indian ______ about five percent of the U.S. population.
A.
fill up
B.
bring up
C.
make up
D.
set up
【单选题】He listened hard but still couldn't______ what they were talking about.
A.
make over
B.
make up
C.
make upon
D.
make out
【简答题】How many people in the U.S. make use of sales promotion offers each year?
【单选题】_____ you are, _____mistakes yo u will make in the test
A.
The more careful; the fewer
B.
The more carefully; the fewer
C.
The more careful; the less
D.
The more carefully; the less
【单选题】According to the passage, the U.S. elementary education is supposed to make children__________.
A.
sensible and sensitive
B.
competitive and interested
C.
curious and friendly
D.
happy and co-operative
【单选题】He expects to _______ the business when his father retires.
A.
pick up
B.
make sense
C.
take over
D.
make up
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