____ forced us to work hard.[ ]
A. March
B. Compete
C. Competition
D. Match
答案:C
(3分)用适当的符号和数字填空:
①2个铁离子_______ ;②3个氨分子________;③氢氧根离子_______;
当奖学金调整在()元/月/人及()元/月/人以上时,导师需填写说明
A.0~800;1000~4000
B.0~600;2000~4000
C.0~800;2000~4000
D.0~600;1000~4000