【多选题】客户的风险属性需考虑客观和主观两个方面,这两个方面分别是
【单选题】已知 Na 2 SO 3 晶体与浓硫酸可发生反应: Na 2 SO 3 + H 2 SO 4 ( 浓 ) == =Na 2 SO 4 + SO 2 ↑ + H 2 O 。如图所示: 在注射器中加入少量 Na 2 SO 3 晶体,并吸入少量浓硫酸 ( 以不接触纸条为准 ) 。则下列有关说法正确的是 ( )
B.
.品红试纸、浸有 KMnO 4 溶液的滤纸均褪色证明了 SO 2 具有漂白性
C.
.湿润的淀粉- KI 试纸变蓝,说明 SO 2 的氧化性强于 I 2
D.
. NaOH 溶液可用于吸收实验中多余的 SO 2
【简答题】Soccer is a popular ______ for a variety of _________. Firstly, players need to use their _________ and ______ their ________ to play soccer. __________ a good level of fitness helps to ________ _____...
【单选题】Which one is NOT the way to achieve appropriateness? ( )
A.
appropriateness to the weather
B.
appropriateness to the speaker
C.
appropriateness to the audience
D.
appropriateness to the topic
【单选题】The best title for the passage would be ______.
B.
Appropriateness of Social Distance
C.
Appropriateness of Relationships between Two Persons
D.
Appropriateness of Physical Contact between Two Persons
【单选题】关于证券公司从业人员持有股票的相关规定,下列说法正确的是( )。
【多选题】以下哪些诗句是写杜甫在成都草堂的生活的?
【单选题】下列哪个故障不会导致气缸压力偏低?( )3
【简答题】下列各化合物晶体中,既存在有离子键又有共价键的是哪些? (1)NaOH (2)Na 2 S (3)CaCl 2 (4)Na 2 SO 4 (5)MgO
【简答题】在 Na 2 SO 4 晶体中有 __________ 和 __________ 离子,两者以 _________ 键结合,在 __________ 离子中有共价键。