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【单选题】
在Excel2010中,+、-、*、/、^和%,这些符号属于哪类运算符A.
关系运算符
B.
算术运算符
C.
连接运算符
D.
引用运算符
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【单选题】普通的外科口罩,它不能制止冠状病毒的进入,因为它的颗粒很小。但戴口罩是( )的,因为口罩是防止飞沫的传染,而这个冠状病毒主要是附着在飞沫上,它不会自己飞来飞去的。
A.
不能
B.
能
C.
有用
D.
无用
【单选题】听力原文：M: How do you manage to feed your family when the food prices are so high? W: We have a garden and some fruit trees, and we raise some fish in the small pond. Q: What does the woman's family do a...
A.
They produce part of their own food.
B.
They sell their own produce.
C.
They feed their family on cheap food.
D.
They buy food from farmers.
【简答题】When I told my family that I was thinking of taking a cooking job, the roars of laughter were rather discouraging. No one believed that I could cook at all, as I had never had achance to practise at h...
【单选题】听力原文：M: How do you manage to feed your family when food prices are so high? W: We have a garden and some fruit trees, and we raise some fish in the small pond. What does the woman's family do about th...
A.
They produce part of their own food.
B.
They sell their own produce.
C.
They feed their family on cheap food.
D.
They buy food from farmers.
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