单项选择题

The transportation of dangerous cargo in packages is governed by（）.

A.IBC code
B.BC code
C.IMDG code
D.IGC code

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The use of（）between bags may lead to chafage and tearing of the bags.

A.strips of burlap
B.heavy paper
C.dunnage boards
D.strips of rope yarm
单项选择题
The valves（）S 0 No.187 is not shown in the plan.

A.below
B.in
C.of
D.under
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