Liu Fang is a famous pipa soloist, ____ whose music is strongly influenced by traditional singing. ____ (graduate) from Shanghai Conservatory of Music, ____ she studied the pipa and the guzheng, she went back to work in her hometown Kunming. She then moved to Canada in 1996 and ____ (live) there since then. For her, the biggest challenge of playing the pipa is to respect the traditions but____ (add) her own style. In her opinion, classical Chinese music and traditional Chinese painting are quite ____(like). The former has ____ (silent) that is full of music ____ the latter features empty spaces which give life to the whole painting. As a soloist, she enjoys performing live, for she likes the atmosphere of a concert. Not having a concert for a long time may put her in a state of ____ (depress). She also enjoys the time immediately after the concert to share the feelings and ideas with the audiences, ____ (listen) to their opinions about the music.

椭圆$\frac{x^2}{3}+y^2=1$的焦距为(　　)

从距地面高h处水平抛出一小石子，石子在空中飞行过程中（空气阻力不计），下列说法不正确的是（  ）