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【简答题】
OSI 参考模型将网络分为7个层次,其中第一层到第三层属于 的功能范畴,第五层到第七层属于 的范畴,第四层起着衔接上下三层的作用。
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反馈参考答案：
举一反三
【简答题】斯滕伯格的爱情三角形理论中,爱情心理实质的三要素是(),(),()。
【单选题】We______ our blouses in plastic-lined, water-proof cartons reinforced with metal straps.
A.
package
B.
packing
C.
packed
D.
pack
【单选题】We thank you for your letter dated March 30____ our silk blouses of various styles.
A.
enquiring for
B.
enquiry for
C.
enquired for
D.
enquire for
【单选题】We thank you for your letter dated May 6th () our skill blouses of various styles.
A.
enquiry for
B.
enquirying for
C.
enquired for
D.
enquire for
【单选题】Please note that we do not allow any commission ___________ our blouses.
A.
for
B.
on
C.
about
D.
at
【单选题】We are confident that once you have tried our blouses, you will place repeat orders with us ___________ large quantities.
A.
at
B.
for
C.
in
D.
by
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