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【单选题】
植物的特点不包括（）。A.
生命力非常长
B.
具有在自身选择的环境下生存的能力
C.
所做的决定不可逆
D.
在生长过程中会不断更新
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举一反三
【单选题】The percentage of purchases on credit cards this year drops by______since 2007.
A.
31%
B.
42%
C.
45%
D.
56%
【单选题】Other commitments remain sparse despite the plan______since 2007.
A.
floated
B.
having been floated
C.
having floated
D.
was floated
【多选题】王先生,男,35岁,汉族,教师,身高170cm,体重70Kg,腰围76cm,家庭自测血压近一年来都在135/85mmHg以上,喜吃腌制品,因科研和教学压力大,长期熬夜加班,睡眠质量不佳,奶奶、父亲高血压,母亲身体健康,兄弟姐妹无高血压。请根据材料请回答以下问题。 根据王先生家庭血压测量情况,推测王先生很有可能得了高血压病,王先生如果真的确诊高血压病,那么您认为其高血压发病的主要危险因素包括( )
A.
饮食偏咸
B.
腰围过大
C.
职业有害因素
D.
高血压遗传风险
E.
经常熬夜加班
F.
工作压力大
G.
男性
【单选题】“Rubber Duck”,________ by Dutch artist Florentijn Hofman，has visited many cities since 2007．
A.
being created
B.
creating
C.
created
D.
having created
【单选题】They studied what ______ since 2007 and found Australian electricity prices were among the highest in the developed world.
A.
has happened
B.
happened
C.
had happened
D.
has been happening
【单选题】Tick bites（蜱虫叮咬）are reported _______ in 12 provinces and claimed 31 lives since 2007.
A.
to break out
B.
to have broken out
C.
to be broken out
D.
to have been broken out
【单选题】The word 'foolish' is too mild to describe your behavior, I would prefer the word ______.
A.
ideological
B.
idyllic
C.
idiotic
D.
idiomatic
【单选题】The world has been shaken by a huge financial crisis since 2007; thanks to each country’s powerful policies, the international trade is improving _________ day by day.
A.
in short
B.
in all
C.
in turn
D.
ingeneral
【简答题】焊前准备的几点要素,如装配间隙、钝边大小、反变形大小的确定。
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