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【判断题】
弯矩的正负号规定,使梁形成上凹形的弯矩为正,反之为负。A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】His mother dislikes him, for he____ lies.
A.
tells
B.
is always telling
C.
has told
D.
always told
【简答题】Mrs Morgan's daughter always helps her mother wash clothes．28． Mrs Morgan's daughter always helps her mother wash clothes．
【单选题】My mother always ______ clothes in the evening, but tomorrow she ______ them in the afternoon.
A.
washes, washes
B.
washes, is going to wash
C.
washed, washes
【简答题】The girl takes after her mother and is always cheerful.
【简答题】16과 연습문제를 풀고 파일을 올려주세요.
【单选题】Not others but Mother always _____ children ______ in their beautiful clothes.
A.
keep; dressed
B.
kept; dressing
C.
keeps; dressing
D.
keeps; dressed
【简答题】Your mother always does．it after work at home．
【单选题】婴幼儿皮肤护理的注意事项:( )
A.
奶量充足时口腔是清洁的，禁忌用纱布擦洗口腔黏膜
B.
奶量充足时口腔是有菌的，禁忌用纱布擦洗口腔黏膜
C.
奶量充足时口腔是清洁的，可以用纱布擦洗口腔黏膜
D.
奶量充足时口腔是有菌的，可以用纱布擦洗口腔黏膜
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