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【单选题】
液压千斤顶重物上升的速度取决于()。A.
重物的大小
B.
杠杆上作用力的大小
C.
单位时间 杠杆上下作用的次数
D.
重物和杠杆上作用力的大小
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皮皮学刷刷变学霸
举一反三
【单选题】We are proud of our country. The year 2019 is her ____ ______ birthday.
A.
seventy
B.
the seventy
C.
the seventieth
D.
seventieth
【单选题】We are proud of our country. The year 2019 is her __________ birthday. A. seventy B. the seventy C. the seventieth D. seventieth
A.
seventy
B.
the seventy
C.
the seventieth
D.
seventieth
【单选题】We are proud of our country. The year 2019 is her ________ birthday.
A.
seventy
B.
the seventy
C.
seventieth
D.
the seventieth
【单选题】We are proud of our country. The year 2019 is her __________ birthday.
A.
Seventy
B.
the seventy
C.
the seventieth
D.
seventieth
【单选题】We are proud of our country. The year 2019 is her __________ birthday.
A.
Seventy
B.
the seventy
C.
the seventieth
D.
seventieth
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