【单选题】下列选项正确的是( )
B.
命题甲: ,命题乙: 或 则甲是乙的充分不必要条件
【单选题】Each of the following events occurred after the reporting date of 31 March 2015, but before the financial statements were authorised for issue. Which would be treated as a NON-adjusting event under IA...
A.
A public announcement in April 2015 of a formal plan to discontinue an operation which had been approved by the board in February 2015
B.
The settlement of an insurance claim for a loss sustained in December 2014
C.
Evidence that $20,000 of goods which were listed as part of the inventory in the statement of financial position as at 31 March 2015 had been stolen
D.
A sale of goods in April 2015 which had been held in inventory at 31 March 2015. The sale was made at a price below its carrying amount at 31 March 2015
【单选题】图示机构在平面内运动,杆AB的B端始终与
【单选题】下列说法中,正确的是
B.
命题“ ,使得 ”的否定是:“ ,都有 或 ”
C.
命题“ 或 ”为真命题,则命题“ ”和命题“ ”均为真命题
【单选题】在图示平面机构中,滑块 B 可在水平滑道内运动,套管 H 可在导杆 OC 上自由滑动。已知: P = 60 kN , Q = 50 kN , OA = L 1 = 25 cm , AB = L 2 = 20 cm , b =16 cm , 不计各构件自重及各接触处摩擦。试用虚位移原理求机构在图示位置 (OC 水平 ) 平衡时,套管 H 的位 置 x 为 。
【简答题】下列结论: ① 若命题p:存在 ,使得 ;命题q:对任意 , ,则命题“ ”为假命题。 ②已知直线 : , : 。则 的充要条件为 。 ③命题“若 ,则 ”的逆否 命题为:“若 则 ”; 其中正确结论的序号为
【简答题】已知命题P:函数f(x)=log 2m (x+1)是增函数,命题Q: x∈R,x 2 +mx+1≥0; (1)写出命题Q的否命题 Q;并求出实数m的取值范围,使得命题 Q为真命题; (2)如果“P∨Q” 为真命题,“P∧Q”为假命题,求实数m的取值范围。
【单选题】In a review of its provisions for the year ended 31 March 2015, Cumla’s assistant accountant has suggested the following accounting treatments: (i) Making a provision for a constructive obligation of ...
【简答题】下图所示在水平面内运动的导杆机构。已知lAB=200mm,l AC =400mm,φ=60°。各构件的质量为:m 1 =5kg(质心S 1 在A点),m 2 =3kg(质心S 2 在B点),m 3 =10kg(质心在S 3 点,L CS 3 =300mm)。各构件转动惯量为:J S 1 =0.05kg·m 2 ,J S 2 =0.002kg·m 2 ,J S 3 =0.2kg·m 2 。作用于从动...