【简答题】栀子生用具有 、 、 等功效;焦栀子具有的功效是 。
【单选题】Of the three sentences in each group, select the one that is NOT a sentence fragment.
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
【判断题】根据酸碱质子理论,溶剂既能给出质子,又能接受质子,是两性物质
【多选题】下列说法正确的是
A.
根据酸碱质子理论,溶剂既能给出质子,又能接受质子,是两性物质
B.
根据酸碱电子理论,提供电对的分子或离子是酸,接受电对的分子或离子是碱
C.
在二元弱酸溶液中,由于第一级解离产生的H+对第二级解离反应产生同离子效应,因此, K a1 Θ > K a2 Θ
D.
25℃时,离子酸NH 4 + 的解离常数 K b Θ (NH 4 + )= K w Θ / K b Θ (NH 3 + )
【简答题】She wouldn't forget her mother's birthday __________ she seldom wrote to her family.
【单选题】Which statement is Not a sentence fragment?
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
【判断题】根据酸碱质子理论,溶剂既能给出质子,又能接受质子,是两性物质。
【单选题】张先生,50岁,突发呼吸困难,满肺哮鸣音,心率快,既往史不详,应首选