It seemed that Ivy was in no________ this evening to listen to my jokes. A. mind B. mood C. feeling D. emotion
日内瓦会议后，毛泽东就外交问题指出：“关门关不住，不能关，而且必须走出去。”这里，“必须走出去”的战略意义在于 A．缓和中苏关系恶化
如图甲,在正方形SG1G2G3中,E、F分别是边G1G2、G2G3的中点,D是EF的中点,现沿SE、SF及EF把这个正方形折成一个几何体(图乙),使G1、G2、G3三点重合于点G,这样,下
在冶金工业上，均不能用通常化学还原剂制得的金属组是 ( )。 A．Na，Ba，Mg，Al B．Na，K，Zn，Fe C．Zn，Fe，Cu，Ag
Wang Fei is a twelve-year-old boy. He is lovely and smart. He is always the best in his class. But his classmates wouldn’t like to play with him because he has AIDS (艾滋病) like his parents.
利用下图装置进行实验，开始时，a、b两处液面相平，密封好，放置一段时间。下列说法不正确的是 A．a管发生吸氧腐蚀，b管发生析氢腐蚀 B．一段
将N2、CO、CO2 的混合气体依次通入足量石灰水和灼热CuO后，冷却至室温，剩余气体是（ ） A. N2、CO2 B. N2 C. CO2
It was in the museum I came across my best friend. A. where B. which C. that D. when
