下列说法正确的是( ) A.做焰色反应实验时,火焰的颜色呈黄色,说明有钠元素存在

题型:选择题

问题:

下列说法正确的是(  )

A.做焰色反应实验时,火焰的颜色呈黄色,说明有钠元素存在

B.欲除去Cl2中混有的HCl,最好是通过饱和石灰水

C.欲除去CO中混有的CO2,可让混合气体通过Na202固体

D.CO2溶于水能导电,因此CO2是电解质

考点:金属的焰色反应
题型:选择题

I`m Tony. My best friends are Frank and Cindy. We often do many things together. Frank lives next to my home and we are in the same class. He is thirteen years old and tall and medium build. He has curly hair and blue eyes. He is good-looking and clever. He is good at math and often helps me with my homework. He likes wearing black pants and yellow T-shirts. Cindy doesn`t go to my school. She is eleven years old. She is thin and medium height. She has curly blonde hair and her eyes are brown. She is good-looking, too, but a little bit shy. She is good at playing the guitar. Her facorite subject at school is music. She often teaches Frank and me to play the guitar after class.

The three of us have great fun together, and we help each other and sometimes play video games at my house.

小题1:        eyes are blue.

A.Frank’s

B.Cindy’s

C.My

D.Tony’s小题2:     good at math .

A.Cindy is

B.Tony is

C.Frank is

D.I am小题3:      is good-looking ,but a little bit shy .

A.Frank

B.Cindy

C.Tony

D.My friend小题4:Where do they play video games ?

A.at school

B.at Frank’s house

C.at Cindy’s house

D.at Tony’s house小题5:What things do the three children do together ? They      .

A.play baseball

B.play video games

C.play the guitar

D.both B&C

题型:选择题

2012年1月份,我国居民消费价格总水平同比上涨了4.5%,比市场预期的稍稍高一些,其中食品价格上涨达到10.5%。为应对物价上涨的压力,某地政府提出要为企业做好“加减乘除”四篇文章。下列做法与对应的“加减乘除”要求一致的是 [ ]

A、“加法”:增加税收,尽量增加财政支出

B、“减法”:科技创新,努力形成品牌效应

C、“乘法”:强化计划,规定生产要素分配

D、“除法”:节能降耗,淘汰技术落后产能

题型:选择题

患者,男性,32岁,既往健康,有烟酒嗜好。1年前发现左上肢"红线",伴肿硬,压痛。5个月前感觉右下肢凉、怕冷,麻木,行走200m出现小腿疼痛。近1个月症状加重,出现夜间疼痛。查体:右下肢发绀,皮温凉,右股动脉弹性好,足背胫后动脉搏动未触及。

根据上述临床分期,应进行的治疗是()

A.中药活血治疗

B.前列腺素E静点

C.患肢理疗

D.戒烟保暖

E.以上均正确

题型:选择题

An analyst does research about option-free bond price change due to both duration and convexity impacts. The duration of an option-free bond is 9.92, and the convexity measure for that bond is 63.8. If interest rates increase by 200 basis points, the bond's percentage price change is closest to:()

A. -22.39%

B. -18.56%

C. -17.29%

题型:选择题

园中“()”为典型的鸳鸯厅,其南北两半部分的屋架、装饰、铺地、雕花、窗格等均为不同的形制,是古代建筑中独特的类型。

更多题库