下列有关实验原理、方法和结论都正确的是 A.将蘸有浓氨水的玻璃棒置于某无机酸浓溶

题型:选择题

问题:

下列有关实验原理、方法和结论都正确的是

A.将蘸有浓氨水的玻璃棒置于某无机酸浓溶液的试剂瓶口,有大量白烟,该无机酸一定为盐酸

B.向含少量苯酚的苯中加入适量溴水后过滤,可除去苯酚

C.向KI淀粉溶液中滴入氯水变蓝,再通入SO2,蓝色褪去,说明SO2具有还原性

D.某溶液中加入硝酸酸化的氯化钡溶液,有白色沉淀生成,该溶液中一定含有SO42

考点:化学实验的基本操作化学实验安全化学实验现象
题型:选择题

Hello! I’m Alex. I often get up at 6:30 am. Half an hour later(之后), I have my breakfast. At 7:30 am, I take a bus to school. We have Math, Chinese and English classes from 8:00 am to 11: 30 am. I have lunch and talk with my classmates at school. We have three classes from 1:40 to 4:10 in the afternoon. After school, I often play with my classmates. We often play soccer, tennis and ping-pong. I go home at about 5:00 pm. I usually have dinner at 6:00 pm. Then I do my homework and watch TV. At about 10:30 pm, I go to bed.

小题1:---When does Alex go to school in the morning?

--- At______.

A.half past six

B.seven

C.six thirty

D.seven thirty小题2:---What time does Alex eat breakfast?

--- At ______.

A.six

B.seven

C.seven thirty

D.eight小题3:How long does it take Alex to have breakfast?

A.Thirty minutes

B.An hour

C.Ten minutes

D.Seven hours小题4:Alex usually ______before he goes to bed.

A.plays computer games

B.takes a shower

C.play soccer

D.watch TV

题型:选择题

钴60的半衰期为5.3年,如该放射源已存放(),则透照时的曝光时间应增加约()。

题型:选择题

男性,30岁,晨起时发现神志模糊,呼之不应,唇呈樱桃红色,呼吸浅慢,脉搏细数,发现室内煤气管道泄漏。

该患者诊断首先考虑()

A.有机磷农药中毒

B.脑卒中

C.脑梗死

D.癔病

E.一氧化碳中毒

题型:选择题

某校开展了以“迎接中 * * 党成立90周年”为主题的读书活动。开展这项活动,有利于激发学生的爱国热情,增强其历史使命感和责任感,有利于引导学生把握人生道理、实践人生追求。这是因为[ ]

①文化能促进人的全面发展

②文化对人具有潜移默化的影响

③有文化修养才会有崇高的道德

④优秀文化能够塑造人生

A、①②

B、②④

C、①③

D、③④

题型:选择题

下列不属于银行保函基本当事人的是()。

A.申请人

B.受益人

C.保兑行

D.担保行

更多题库