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问题 选择题

下列离子方程式正确的是

A．向次氯酸钙溶液中通入SO2:Ca2++2ClO-+H2O+SO2= CaSO3↓+2HClO

B．向氯化亚铁溶液中加入稀硝酸3Fe2++4H++NO3-=3Fe3++2H2O+NO↑

C．向(NH4)2SO4溶液中加入适量Ba(OH)2：Ba2++SO42-=BaSO4↓

D．向碳酸氢铵溶液中加入足量的氢氧化钠溶液加热：NH4++OH-NH3↑+H2O

答案

答案：B

单项选择题

钩端螺旋体病的临床表现是()

A．长期持续高热

B．发热、咳嗽、吐白色粘痰

C．发热、头痛、结膜充血、腓肠肌痛

D．发热、恶心、呕吐、腹痛

E．发热、咳嗽
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单项选择题

Charles liked music very much when he was at school, but (41) he went to the university he decided to study medicine (42) music. When he passed his examinations and became a doctor, he had to work in a hospital for (43) . There he discovered that a lot of patients were happier if (44) music was played for them. When Charles got an office and began to work (45) himself, he decided to (46) his patients happy by having a tape recorder in his waiting room play beautiful music for them.
But (47) the tape recorder had been put in(安装), Charles’ nurse heard a woman complain in the crowded (48) , "Here we’re (49) waiting to see the doctor, and he’s just playing (50) piano in his office instead of doing his work. \

[A]get [B]keep [C]have
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