--- Don’t put the waste on the ground. --- Oh, sorry.I ______ the dustbin just over there. A. hadn’t seen B. can’t see C. didn’t see
The man in prison insisted that he ______ nothing wrong and he_____set free. A.had done;should be B.should do;should be C.had done;had been
The novel “The Da Vinci Code” _____ a great success and was translated into 44 languages in 2004.A.appreciated B.enjoyed C.won D.seized
如图,已知,,要使≌,可补充的条件是 (写出一个即可).
元素R在化合物中只有一种化合价,其氧化物的化学式为R2O3,则下列化学式中正确的是( ) A.R(OH)2 B.R2(SO4)3 C
已知半椭圆与半椭圆组成的曲线称为“果圆”,其中,是对应的焦点。 (1)若三角形是边长为1的等边三角形,求“果圆”的方程; (2)若,求的取值
一小物体以加速度a从静止出发做匀加速直线运动,在时刻t,加速度变为2a;在时刻2t,加速度变为3a……在时刻nt,加速度变为(n+1)a.求在nt时刻该物体
She felt _____ of having asked such a silly question when the audience couldn't help laughing. A. guilty B. crazy C. miserable D. ashamed