皮皮学，免费搜题
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【多选题】
根据测出的信号,光电编码器可分为A.
接触式编码器
B.
非接触式编码器
C.
绝对式编码器
D.
增量式编码器
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】简述老年人的饮食保健原则。
【单选题】In the phrase " these two big stone bridges", the center is__________.
A.
bridges
B.
these bridges
C.
stone bridges
D.
two stone bridges
【简答题】LIO是指__________。
【简答题】简述老年人自我保健的原则？
【简答题】简述老年保健的原则。
【简答题】The two stone lions stand for the supremacy and power of the emperor.
【单选题】The Great Pyramid is made _____ of two million stones and each stone _____ more than two tons. [ ]
A.
from; weighs
B.
up; has
C.
from; has
D.
up; weighs
【单选题】The building ______ stone and each stone ______ more than two tons (吨). [ ]
A.
is made of; weighed
B.
is made of; weights
C.
is made of; weighs
D.
is made from; weighs
【简答题】简述老年保健的基本原则。
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