Cu、Cu2O和CuO组成的混合物,加入100mL0.6mol/LHNO3溶液恰好使混合物溶解,同时收集到224mLNO气体(标准状况),则下列说法不正确的是A.Cu2O跟稀硝酸反应的
下列关于电解质溶液的叙述正确的是 A.常温下,在的醋酸钠和醋酸混合溶液中: B.稀释醋酸溶液,溶液中所有离子的浓度均降低 C.在的氯化钠和稀硝
----- Oh, how depressing! I am bound to lose to him in tomorrow’s competition. ----- Cheer up! In fact, he is _____ than you. A. not more nervous B. no more
材料一:十六届四中全会提出坚持以人为本、全面协调可持续科学发展观。重视计划生育,节约资源,保护环境和安全生产,大力发展循环经济,建设
在等差数列{an}中,已知a1=8,a6 =-2,求d = A.-1 B.-2 C.1 D.2
某个用电器上标有“12V”字样,已知它的电流随电压变化的图像如图19所示。利用该图像可以求出该用电器的的额定功率是 W。 图19
Being a good friend isn’t always easy, but taking the time to develop a lasting friendship is worth the effort. As the years pass, you will realize that each friendship you keep is priceless. 16
第三代混合动力车,可以用电动机、内燃机或二者结合推动车辆。汽车上坡或加速时,电动机提供推动力,降低汽油的消耗;在刹车或下坡时,电池处