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【多选题】
发动机温度过热时()是错误的表现A.
发动机熄火困难
B.
汽油机容易发生爆燃或早燃
C.
热车启动容易
D.
发动机经济性变好
E.
机油容易变质
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反馈参考答案：
举一反三
【简答题】这与定理的条件(),所以G是连通的。
【单选题】People appreciate _______wit him because he has a good sense of humor.
A.
． to work
B.
． to have worked
C.
． working
【简答题】Because wealthy people are willing to take a risk, they are always presented wit investment opportunities
【单选题】Fear can be useful emotion to us because it can_____.
A.
stimulate many physical changes within our body
B.
quicken our heartbeat and responses
C.
pour large quantities of adrenaline into our bloodstream
D.
help us respond quickly to danger and protect ourselves
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