【单选题】China still has a long way to go in the robotics industry because .
A.
few robot-related firms have been establised
B.
talented robotics scientists are in short supply
C.
key parts of robots are still imported
D.
investment in the robot industry is hard to find
【判断题】形如 ( 且 )的式子叫做 的 次根式,其中 叫做根指数, 叫做被开方数。
【判断题】《登高》前两联重在抒情 ,后两联重在写景 。
【简答题】梅毒螺旋体主要经( )和( )两种途径传播。
【简答题】多民族是我国的一大特色。在历史演进中,我国各民族形成了( )、( )、谁也离不开谁的多元一体格局。