A、正确
B、错误
答案：A
A、正确
B、错误
答案：A
A. 正确
B. 错误
解析：解析:正确:在 6130 型柴油机的型号中“6”表示的是发动机的缸数。
A. 正确
B. 错误
A. 煤气机
B. 蒸汽机
C. 电动机
D. 汽轮机
解析： BF001 内燃机的分类按燃料不同可分为汽油机、柴<|endoftext|> There are several reasons why dogs may engage in excessive licking: Anxiety or stress: Licking can be a soothing behavior for dogs, similar to how humans may comfort themselves by biting their nails or twirling their hair. Dogs may lick excessively when they are feeling anxious, stressed, or nervous. Medical issues: Excessive licking can be a sign of underlying medical issues such as allergies, skin infections, or gastrointestinal problems. If your dog's licking is accompanied by other symptoms such as redness, swelling, hair loss, or a change in appetite, it's important to consult with a veterinarian. Boredom or lack of stimulation: Dogs that are bored or not getting enough mental and physical stimulation may resort to excessive licking as a way to pass the time. Attention-seeking behavior: Some dogs may lick excessively as a way to get attention from their owners. If your dog realizes that licking gets them attention or treats, they may continue to do so. Habit: Dogs are creatures of habit, and they may develop a licking habit if they find it comforting or rewarding in some way. It's important to observe your dog's behavior and consult with a veterinarian if you are concerned about their excessive licking. They can help determine the underlying cause and recommend appropriate treatment.
,手心朝下,以腕部为轴,重复向下摆动手掌,是指挥发出的( )信号。
A. 指示降落方位
B. 吊钩下降
C. 吊钩微微下降
D. 降臂
解析：在手势指挥信号中，手臂伸向侧前下方，与身体夹角约为，手心朝下，以腕部为轴，重复向下摆动手掌，是指挥发出的( )信号。
答案:C
解析：根据题目描述，手臂伸向侧前下方，手心朝下，腕部为轴，向下摆动手掌，这个手势动作表示的是吊钩微微下降。因此，正确答案是C，吊钩微微下降。
A. 正确
B. 错误
A. 正确
B. 错误
解析：解析:正确:三轴式五档变速器的倒档齿轮采用直齿齿轮。
A. 正确
B. 错误
解析：解析:正确:砂轮机的搁架与轮间距离一般应保持在3 mm以内,工件与砂轮之间接触要保持合适角度。
A. 正确
B. 错误
解析：解析:正确:使用钢丝绳夹制作的索扣,钢丝绳的紧固强度取决于绳径和绳夹匹配,以及一次紧固后的二次调整紧固。
A. 叠堆法
B. 摩擦法
C. 敲击法
D. 转移法
解析：题目解析 题目描述的是一种焊接方法，其中电弧逐渐引向坡口的斜前方，同时抬高焊条，使熔池逐渐缩小。这种方法被称为转移法。因此，正确答案为D. 转移法。
A. 正确
B. 错误
