正确答案: B
much less than
题目:According to the passage, we can infer that the pole piece diameter must be tooth height.
解析:B
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举一反三的答案和解析:
[单选题]_____ of the controllable pitch propeller enables the blades to be moved to change the pitch angle
An internal mechanism
[单选题]海上待救时,艇筏集结相互间间距为:
20~30米
[单选题]()期间应检查管系、阀门是否有泄漏;透气系统是否处于设定状态;未装货舱也应检查,防止阀门开错或泄漏。
开始装货
[单选题]锚泊中从事疏浚作业的船舶,在白天应显示____。
球、菱形、球垂直三个号型