液化石油气钢瓶是充装固体的专用容器。
参考答案:错
Kathy opened her mouth, expecting a candy and then looked puzzled______ she got nothing.
A.when
B.although
C.so
D.Once
如图所示,有关电与磁的四幅实验装置中,用来研究磁场对电流作用的是