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【单选题】
How many people were injured by guns each year?A.
30 000.
B.
46.
C.
750 000.
D.
75 000.
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【简答题】Did you remember ______ (switch off) the lights when you left the office?
【单选题】When unscrupulous people shoplift, a vicious cycle results. Retailers must raise their prices in order to make up for the lost sales, and the higher prices encourage more people to shoplift. This vici...
A.
Shoplifters usually steal only items that they need but cannot afford.
B.
Retailers do not take shoplifting losses into account when they initially set their prices.
C.
The best way for retailers to address shoplifting is by punishing shoplifters to the tallest extent of the law.
D.
Some people would shoplift no matter how low retailers set their prices.
E.
It costs retailers more to pay security guards to prevent shoplifting than just to absorb the cost of occasional losses due to theft.
【简答题】原始瓷器之所以称作“原始”瓷器,说明它虽然已具备了瓷器的主要特征,但是还不够成熟。其主要原因是它还没有达到成熟瓷器烧制所需的____以上的温度。
【单选题】（4）80C51的定时器 T1 用作定时方式且选择模式 2 时，工作方式控制字为 __ ____。
A.
TCON=0x60;
B.
TCON=0x02;
C.
TMOD=0x06;
D.
TMOD=0x20
【简答题】(8)80C51的定时器T1用作定时方式且选择模式2时,工作方式控制字为______。A.TCON=0x60; B.TCON=0x02; C.TMOD=0x06; D.TMOD=0x20;
【简答题】原始瓷器之所以称作“原始”瓷器,说明它虽然已具备了瓷器的主要特征,但是还不够成熟。其主要原因是它还没有达到成熟瓷器烧制所需的____以上的温度
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