皮皮学，免费搜题
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搜题
【判断题】
当计算梁的某截面上的剪，截面保留一侧的横向外力向上时为正，向下时为负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】I bought a used Longman Dictionary yesterday. It ____ me only twenty yuan.
A.
spent
B.
cost
C.
used
D.
took
【单选题】I bought some CDs for my friend and they _____ me ￥30. [ ]
A.
spend
B.
paid
C.
cost
D.
used
【单选题】I bought some CDs for my friend and they ______me 30 yuan. [ ]
A.
spend
B.
cost
C.
paid
D.
used
【单选题】I bought some CDs for my friends and they _____ me 30 dollars.
A.
spent
B.
paid
C.
cost
D.
used
【单选题】The used car I bought cost four _____ pounds.
A.
thousands
B.
thousand of
C.
thousands of
D.
thousand
相关题目：
【单选题】I bought some CDs for my friend and they ______me 30 yuan. [ ]
A.
spend
B.
cost
C.
paid
D.
used