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【单选题】
下图中三个实体进行了哪种布尔运算得到右边的图?
A.
求和
B.
求差
C.
求交
D.
不能确定
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【单选题】“Which of these two ties will you take?” “I’ll take to give me a change sometimes.”
A.
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B.
both
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D.
all
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A.
穿上
B.
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A.
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【简答题】已知等比数列 的各项均为正数,且 成等差数列, 成等比数列. (1)求数列 的通项公式; (2)已知 ,记 , ,求证:
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【单选题】—Which of these two sweaters will you take? —I'll take . They look nearly the same, and I just need one. [     ]
A.
both
B.
either
C.
none
D.
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A.
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B.
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C.
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D.
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【单选题】– Which of these two English books will you borrow? – I’ll borrow of them. Because they are very interesting.
A.
either
B.
all
C.
neither
D.
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【单选题】如下图所示为空间点A到三个投影面的投影图,A点到侧面的距离为
A.
A点的X坐标值
B.
A点的Y坐标值
C.
A点的Z坐标值
D.
0
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