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【判断题】
M8002为初始脉冲,仅在运行开始瞬间其常开触点接通一个扫描周期A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列操作不正确的是（ ）
A.
旋摇分液漏斗时，用一手指末节顶住玻塞，再用大拇指和中指夹住漏斗上口径
B.
食指和中指食指和中指蜷握在活塞柄上握住活塞柄并能自由地旋转
C.
旋摇分液漏斗时将漏斗稍倾斜，漏斗的活塞部分向下
D.
旋摇分液漏斗时将漏斗稍倾斜，漏斗的活塞部分向上
【单选题】旋摇分液漏斗时下列操作不正确的是（ ）
A.
旋摇分液漏斗时，将漏斗由外向里剧烈旋摇
B.
旋摇分液漏斗时，将漏斗由里向外剧烈旋摇
C.
旋摇分液漏斗时，漏斗的活塞部分向上倾斜
D.
旋摇分液漏斗时，漏斗的活塞部分向下倾斜
【单选题】Cultural rules determine every aspect of food consumption. Who eats together defines social units. For example, in some societies, the nuclear family is the unit that regularly eats together. The anth...
A.
people who eat together.
B.
the kinds of food served.
C.
snacks and hamburgers.
D.
family members and guests.
【简答题】TEXT D Cultural rules determine every aspect of food consumption. Who eats together defines social units. For example, in some societies, the nuclear family is the unit that regularly eats together. T...
【简答题】Cultural rules determine every aspect of food consumption. Who eats together defines social units. For example, in some societies, the nuclear family is the unit that regularly eats together. The anth...
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