皮皮学，免费搜题
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搜题
【单选题】
使用启 - 保 - 停电路设计梯形图程序 , 每一步可以当做被控线圈来处理。找到每步的启动条件和停止条件,转换实现的条件是它的前级步是 步并且满足相应的转换条件。A.
活动
B.
不活动
C.
当前
D.
后续
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】停留时间对裂解反应有何影响?
【单选题】From the mid-1980s, the Chinese government began to give top ______to scientific and educational development.
A.
preference
B.
primacy
C.
privilige
D.
priority
【简答题】听录音,完成下面的选择题和填空题。
【单选题】From the mid-1980s, the Chinese government began to give top ___ to scientific and enducationa development.
A.
preference
B.
primacy
C.
privilege
D.
priority
【简答题】频率大于 HZ的机械波被称为超声波。
【判断题】From the mid-1980s through the mid-1990s, the percentage of consumers reporting that they were very concerned about the nutritional content of the food they ate fell slightly.
A.
正确
B.
错误
【单选题】From the mid 1980s, the Chinese government began to give top _____to scientific and educational development.
A.
preference
B.
primacy
C.
privilege
D.
priority
【单选题】From the mid-1980s, the Chinese government began to give top____ to scientific and education development.
A.
preference
B.
primacy
C.
privilege
D.
priority
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