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【单选题】
砖砌体水平灰缝砂浆饱满度应不少于( )。
A.
0.5
B.
70%
C.
80%
D.
100%
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A.
瘤胃内微生物的作用
B.
大肠内微生物的作用
C.
小肠运动
D.
反刍
E.
消化液中酶对饲料的分解
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A.
What an excited; seven thousand word’s
B.
What excited; seven thousand words
C.
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A.
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B.
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C.
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D.
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A.
左心房
B.
左心室
C.
右心房
D.
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E.
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【单选题】下列属于反刍动物特有现象的是。
A.
胃肠运动
B.
咀嚼。
C.
瘤胃氮素循环。
D.
微生物消化
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