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【简答题】
MCS-51单片机有 5 个中断源,可分为 2 个中断优先级。上电复位时_____中断源的最高。
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【简答题】阅读理解 We've all heard the old saying,'Sticks and stones can break my bones,but words can never hurt me.' Don't you believe it?Words are powerful,and they can hurt-a lot. In fact,if you're not careful,y...
【简答题】阅读短文,根据短文内容回答问题。(共10分,每小题2分) We’ve all heard of merm. They are the beautiful half-human, half-fish creatures(生物). They have the head and body of a human and the tail of a fish. We also know that m...
【单选题】This is a ____ story . When we heard this, we are all _____.
A.
surprising; surprising
B.
surprised; surprising
C.
surprising; surprised
D.
surprised; surprised
【简答题】汞洒落后,应立即撒上 ,并打开墙下部的排气扇。
【简答题】We've all heard the old saying,“Sticks and stones can break my bones,but words can never hurt me.” Don't you believe it?Words are powerful,and they can hurt—a lot. In fact,if you're not careful,you ca...
【单选题】We were all __________when we heard the news.
A.
surprising
B.
amazing
C.
surprised
D.
interesting
【单选题】We've just heard a warning on the radio that a hurricane is ____ to come this evening. [     ]
A.
likely
B.
possible
C.
probable
D.
believable
【判断题】这节课我们走进了武警中队。
A.
正确
B.
错误
【单选题】洛仑兹力可以
A.
改变带电粒子的速率
B.
改变带电粒子的动量
C.
改变带电粒子的动能
D.
对带电粒子作功
【简答题】减小液压冲击的措施有哪些?
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