下列说法错误的是 A.常温下,将pH=3的醋酸溶液稀释到原体积的10倍后,溶液的

题型:选择题

问题:

下列说法错误的是

A.常温下,将pH=3的醋酸溶液稀释到原体积的10倍后,溶液的pH小于4

B.为确定某酸H2A是强酸还是弱酸,可测NaHA溶液的pH。若pH>7,则H2A是弱酸;若pH<7,则H2A是强酸

C.用0.200 mol·L-1 NaOH标准溶液滴定HCl与CH3COOH的混合液(混合液中两种酸的浓度均约为0.1 mol·L-1),至中性时,溶液中的酸未被完全中和

D.相同温度下,将足量氯化银固体分别放入相同体积的①蒸馏水、②0.1 mol·L-1盐酸、③0.1 mol·L-1氯化镁溶液、④0.1 mol·L-1硝酸银溶液中,Ag+浓度: ④>①>②>③

考点:离子共存
题型:选择题

生长激素的副作用有哪些()

A.局部红肿

B.产生抗体

C.视盘水肿

D.颅高压

E.增加股骨头坏死的发生率

题型:选择题

根据短文内容和所给的中文提示,写出空白处各单词的正确形式。每空一词。

Hi Betty,

Thank you for your invitation. I’m _小题1:_(抱歉), but I can’t come. You see, I have a really __小题2:_(忙碌)week. This evening I’m going bike__小题3:_(乘骑)with some friends. and tomorrow, after a _小题4:_(迅速的)breakfast,I have to go to the__ 小题5:__(牙医). (Yuck!) On Wednesday, I’m  _小题6:_(锻炼) with the school team. And I have to study for my __小题7:(物理)test on Thursday. It is very _小题8:_(重要) for me. On Friday evening, I’m going to my cousin’s party_小题9:_(直到)11 o’clock. I’m free on Saturday morning. Can you come to the movies or have video games with us at home at that_小题10:_(片刻)?

Write soon.

Xiao Ming

题型:选择题

— Peter is _______ than you, right?

—Yes, but he is _______ runner in our class.

A.heavier; best

B.heavy; the best

C.heavier; the best

D.heavy; better

题型:选择题

高钾血症有可能不引起下列哪项心电图改变()

A.PR间期延长

B.T波高尖

C.QRS波延长

D.U波出现

E.QT间隙延长

题型:选择题

图解式评价量表法

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