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【判断题】
曲柄摇杆机构中,以摇杆为件,那么摇杆处于两极限位置时,无论施加多大的驱动力,进不能使从动件转动,且转向不确定,把这两个位置称为死点位置。
A.
正确
B.
错误
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A.
正确
B.
错误
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A.
正确
B.
错误
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【判断题】革兰氏阴性菌细胞壁组成简单
A.
正确
B.
错误
【判断题】位于辽宁盘锦的红海滩是世界上最大的湿地红海滩奇观。( )
A.
正确
B.
错误
【简答题】I’ m Tina. I am 41 English girl. I 42 England. I 43 13 years old. I am 44 . I have a round face, a small nose, a wide mouth, long 45 and 46 eyes. I have a brother(弟弟). His name is James. He is a stude...
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