下列有关实验原理或实验操作正确的是 图1图2 A.将乙醛加入含有新制银氨溶液的

题型:选择题

问题:

下列有关实验原理或实验操作正确的是

      

图1                             图2

A.将乙醛加入含有新制银氨溶液的试管中,于沸水浴中加热来值得银镜

B.称量12.5gCuSO4·5H2O,配成100mL溶液,得到0.5mol/L的CuSO4溶液

C.用图1装置检验实验室制得的乙烯中混有SO2和CO2

D.利用图2装置从氯化铁溶液中直接蒸发结晶获得氯化铁晶体

考点:设计实验方案及探究实验
题型:选择题

When I was 13 my only purpose was to become the star on our football team. That meant  21 Miller King, who was the best   22  at our school.

Football season started in September and all summer long I worked out. I carried my football everywhere for      23   .

Just before September, Miller was struck by a car and lost his right arm. I went to see him after he came back from   24  . He looked very   25  , but he didn’t cry.

That season, I  26  all of Miller’s records while he   27  the home games from the bench. We went 10-1 and I was named most valuable player,   28  I often had crazy dreams in which I was to blame for Miller’s   29  .

One afternoon, I was crossing the field to go home and saw Miller  30   going over a fence—which wasn’t  31  to climb if you had both arms. I’m sure I was the last person in the world he wanted to accept   32 from. But even that challenge he accepted. I  33   him move slowly over the fence. When we were finally   34   on the other side, he said to me, “You know, I didn’t tell you this during the season, but you did   35  .Thank you for filling in for  36  .”

His words freed me from my bad  37  . I thought to myself, how even without an arm he was more of a leader. Damaged but not defeated, he was  38  ahead of me. I was right to have  39 him. From that day on,I grew  40  and a little more real.

23()

A.practice 

B.show 

C.comfort 

D.pleasure

题型:选择题

某单位利用业余时间举行了3次义务劳动,总计有112人次参加,在参加义务劳动的人中,只参加1次,参加2次和3次全部参加的人数之比为5:4:1,问该单位共有多少人参加了义务劳动?

A.70 

B.72 

C.77 

D.80 

E.85 

F.92 

题型:选择题

涤纶长丝部分定向单股纱线

题型:选择题

网络层安全包括。()

A.端口扫描

B.窃取报文

C.拒绝服务攻击

D.网络服务安全

题型:选择题

甲企业向乙保险公司投保企业财产保险,在保险期限内,因暴风引起电杆倒塌,电线短路引起火花,火花引燃厂房,从而导致保险标的严重受损。下列属于保险标的损失的近因是()

A.暴风

B.电杆倒塌

C.火花

D.厂房燃烧

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