question: blitzkrieg:tactics:raid
choices.label: A B C D
choices.text: lubricant:machine:shock absorption desert:terrain:aridity air-raid shelter:bombing:concealment zebra crossing:mark:pass through
explanation: "blitzkrieg" was a "tactic" used by nazi germany in world war ii. it used "raid" to beat the enemy, using mechanized troops to quickly cut the enemy's main force to achieve the desired effect. "blitzkrieg" is a type of "tactic", and "raid" is an attribute of the blitz. "lubricant" is not a kind of "machine", "machine" does not include "lubricant", and "shock absorption" is an attribute of "lubricant". "desert" refers to an area where the ground is almost covered with coarse sand, gravel and sparse plants. "desert" is a kind of "terrain", and "aridity" is an attribute of "desert". an "air-raid shelter" is a hole dug to prevent enemy "bombing". "bombing" does not include "air-raid shelter". "concealment" is the attribute of "air-raid shelter". a "zebra crossing" is a kind of "mark" used to guide pedestrians to "pass through". the "mark" includes "zebra crossing", and "pass through" is the function of the "zebra crossing".
relation: blitzkrieg tactics R2.2
relation: blitzkrieg raid R3.1
relation: zebra crossing pass through R3.10