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【简答题】
草图绘制圆弧的方法有通过()和圆心、端点建立圆弧。
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举一反三
【单选题】The word 'infertile' (Line 1, Para. 2) most probably means '______ '
A.
unable to give birth to a child
B.
with physical and emotional problems
C.
short of time and money
D.
separated from each other for long
【单选题】双眼皮和单眼皮是一对相对性状，双眼皮由显性基因B控制，单眼皮由隐性基因b控制．一对夫妇都是双眼皮，子女却为单眼皮，这对夫妇的基因型是（ ）
A.
都是BB
B.
都是Bb
C.
都是bb
D.
一方BB，一方bb
【单选题】The sentence 'Children are a relatively modern invention' underlined in Paragraph 1 means that children______.
A.
were exactly the same as adults a few hundred years ago
B.
did not exist at that time because there were no families yet
C.
were not different from adults in physical appearance
D.
were not different from adults
【单选题】The lead-time for delivery is blowing out.I n this case, saying that we need to improve our performance means_______.
A.
to cut down on the physical handling.
B.
to automate the system
C.
to shorten the time it takes to deliver goods.
【简答题】美术和政治在上层建筑领域里的关系是（）的关系，不是决定与被决定的关系。
【单选题】The word' infertile' ( Line 1, Para, 2) most probably means '______'.
A.
unable to give birth to child
B.
having physical and emotional problems
C.
short of time and money
D.
separated from each other for long
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