题目内容
（请给出正确答案）
[填空题]
Contraction should not be used in()writing.
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A.formal
B.familiar
C.former
更多“Contraction should not be used…”相关的问题
第2题
When you perform. the ring network expansion/contraction on ZXCTN6200, for 1+1 linear
protection group, after the working tunnel is modified, you should () on the both ends.
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第10题
Because the circulating water is in a closed loop,_______is installed to cater for expansi
on and contraction of the water at different conditions of operation.
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A.an expansion joint
B.a drain tank
C.a head tank
D.a contraction tank
第11题
Allowances may be made for the expansion and contraction in piping by the use of expansion
joints or ().
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A.Unions
B.Retractable flanges
C.Union bulkhead fittings
D.Bends or loops in the line
