“All the students don’t work hard.” means “_________”

A．Not all the students work hard.

B．Every student works hard.

C．None of the students works hard.

D．All of the above.

有关广西的叙述，不正确的是[ ]

A．靠近珠江三角洲，经济很发达

B．河流众多，水力资源丰富

C．地势起伏，喀斯特地形广布

D．交通不够发达，经济相对落后