氮氧化物急性中毒时的主要危害是()。
A.眼结膜炎
B.鼻炎
C.肝损伤
D.化学性肺炎,肺水肿
E.消化系症状
参考答案:D
阅读下列短文,判断正(A)误(B)。
( )1. Jane often annoys her classmate in math classes.
( )2. Jane does best in P.E.
( )3. Jane is good at writing compositions.
( )4. She needs to work hard at learning languages ,or she will fail in them.
( )5. According to the form, we can know Jane has got ten subjects.
从国家权力机关和国家元首的产生方式及其职权范围看,现代国家大致有两种基本的形式[ ]
A.民主共和制和专制制度
B.民主共和制和君主立宪制
C.资本主义国家和社会主义国家
D.议会制和总统制