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【单选题】
若企业各个产品系列之间在生产技术、分销渠道及顾客等方面具有一致性，则称产品组合（ ）A.
比较深
B.
比较宽度
C.
很广
D.
关联性强
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皮皮学刷刷变学霸
举一反三
【单选题】The example of the children holding hands when crossing the street in the last paragraph shows that
A.
social distance is not always needed.
B.
there is no social distance among small children.
C.
humans are different from animals in social distance.
D.
social distance is sometimes determined by outside factors.
【单选题】Go______ the street, walk _______the post office,and_______ the street, and you will see the book shop in front of you.
A.
along; pass; cross
B.
along; past; across
C.
along; past; go across
D.
on; past; go cross
【简答题】FX 2N 系列PLC的编程方式主要有三种: 、 和 。
【单选题】I was walking along the street when someone across the street waved his hand to me, as if _____ me something. [ ]
A.
telling
B.
told
C.
was telling
D.
to tell
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