【简答题】The color TV set you bought ____________ (比不上我买的那台).
【判断题】若高斯面上的D处处为零,则面内自由电荷的代数和必为零。
【单选题】高脂血症选用饮食时,下面哪组食物不宜选用
【单选题】Color TV was first shown in 1929. It took more than two decades, _____, until 1951, for color broadcasts to begin in the USA. [ ] A. though
【单选题】As for quality of this model of color TV sets, the ones made in China are by no means ______those imported.