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【简答题】
" Why do some women like to decorate the Christmas tree but dread taking it ____?" “Because it is not easy to take a tree ____. It is sometimes difficult to remove the decorations and often the pine needles go all over the floor.
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】1英寸=25.4mm，1atm=()米水柱。
【简答题】()泰勒标准筛从没英寸(25.4mm)筛网长度上的孔数即目。
【简答题】If the diameter of the new suce is 50mm, the diameter of the finished suce is 46mm, what is the depth of cut for turning?
【单选题】If the elongation of wire BC is 0.3 mm after the force P is applied, the magnitude of P is ( ). The wire is A-36 steel and has a diameter of 3 mm.【图片】
A.
942 N
B.
628 N
C.
1256 N
D.
314 N
【单选题】An aluminum bar(E = 72 GPa, 【图片】) of diameter 50 mm cannot exceed a diameter of 50.1 mm when compressed by axial force P. The maximum acceptable compressive load P is approximately:
A.
190 kN
B.
200 kN
C.
470 kN
D.
860 kN
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