广州早茶文化历史悠久,至今保留着 “ 一温两件 ”“ 扣指谢茶 ” 等饮茶习俗。早些年,老茶楼里服务员的吆喝声此起彼伏,现在,顾客只要扫描二维码就可轻松完成下单和结账:有的茶楼也推出了新式茶点,并引进了各式各样的西式糕点,吸引了更多顾客前来品尝。由此可见( )
① 科技的进步推动了文化消费方式的变化
② 善于推陈出新,文化才能充满生机与活力
③ 融汇各种文化特质是文化创新的根本途径
④ 文化决定着人们的交往方式
A . ①② B . ①③ C . ②④ D . ③④
This past weekend, I saw the movie Harry Potter and the Goblet of Fire. As part of the popular book and movie series Harry Potter, it was definitely one to remember.
This movie is mainly about a largescale __1__ between wizards that takes place at Hogwarts over the course of the school year. Harry has __2__ the contest, which is known as The Triwizard Tournament, and many twists and turns make for quite the __3__ competition. True to Harry Potter form, the __4__ meet problems, tragedies, challenges, and mysterious behaviors that they are forced to __5__.
New characters were __6__ in this movie, which was an enjoyable aspect and added a new element of intrigue that the __7__ Harry Potter movies did not __8__. Furthermore, this installment of the series seemed to __9__ its original book the most closely and accurately. Also, this movie was a good __10__: not excessively long but long enough to tell the story. Another great aspect of the __11__ was the special effects, particularly relating to all of the scenes featuring the dragons.
This movie was also different from the rest __12__ it had more story concerning the characters' love. In one particular __13__, there was a dance that all of the tournament contestants were to __14__. The characters went to the ball, and it was so much fun to __15__. First of all, the scenery of the ball was beautiful, and it was so __16__ to actually feel like you were there! This was definitely one of the __17__ of the movie.
Overall, this was, in my opinion, the best Harry Potter film yet and __18__ the fantastical story of wizards and the world of Hogwarts extremely well. With the __19__ of new characters, the fastpaced nature of the film, and the added __20__ aspects, this movie was truly a great one.
1.A.campaign B.fight
C.competition D.conflict
2.A.organized B.entered
C.quitted D.recorded
3.A.horrible B.cruel
C.fair D.adventurous
4.A.characters B.soldiers
C.players D.adventurers
5.A.account for B.work out
C.keep on D.go through
6.A.recognized B.honored
C.introduced D.praised
7.A.previous B.complex
C.fantastic D.thrilling
8.A.discover B.improve
C.express D.possess
9.A.change B.follow
C.explore D.support
10.A.ending B.plot
C.length D.exhibit
11.A.movie B.book
C.show D.exhibit
12.A.when B.if
C.though D.because
13.A.condition B.scene
C.time D.stage
14.A.perform B.enjoy
C.attend D.act
15.A.watch B.dance
C.sing D.read
16.A.attractive B.colorful
C.real D.cool
17.A.effects B.highlights
C.meanings D.results
18.A.portrays B.explains
C.proves D.analyses
19.A.expect B.influence
C.help D.addition
20.A.mysterious B.violent
C.romantic D.moral
采用 CRISPR/Cas9 基因编辑技术可将增强型绿色荧光蛋白( EGFP )基因定点插入到受精卵的 Y 染色体上,获得转基因雄性小鼠。该转基因小鼠与野生型雌性小鼠交配,通过观察荧光可确定早期胚胎的性别。下列操作错误的是( )
A .基因编辑处理的受精卵在体外培养时,不同发育阶段的胚胎需用不同成分的培养液
B .基因编辑处理的受精卵经体外培养至 2 细胞期,须将其植入同期发情小鼠的子官,才可获得表达 EGFP 的小鼠
C .分离能表达 EGFP 的胚胎干细胞,通过核移植等技术可获得大量的转基因小鼠
D .通过观察早期胚胎的荧光,能表达 EGFP 的即为雄性小鼠胚胎
工业上用低品铜矿(主要含CuS、FeO等)制备氯化亚铜(CuCl)的一种工艺流程如图:
已知:①CuCl微溶于水,不溶于乙醇,露置于潮湿的空气中易被氧化。
②“氧化”时,NO中N元素主要被还原为最低价态,少部分被还原为NO。
(1)①“氧化”阶段的温度需控制在65℃,其适宜的加热方式为____;
②该步骤中FeO被NH4NO3氧化,其主要反应的离子方程式:____。
(2)在实验室进行实验时,“氧化”阶段反应可在如图所示装置中进行:
①实验开始时,温度计显示反应液温度低于室温,主要原因是____。
②通入氧气的目的是____。
③为便于观察和控制产生O2的速率,制备氧气的装置最好选用_______(填字母)。
(3)已知常温下CuCl在水溶液中Ksp=1.2×10-6,工艺流程最后一步析出CuCl晶体后的溶液中,如果c(Cl-)=4.0mol·L-1,则c(Cu+)=____。
(4)已知pH对CuCl沉淀率的影响如图所示,请设计从“过滤II”所得的滤液中获取CuCl的实验方案:____。(实验中必须使用的试剂有:NaCl溶液、Na2SO3溶液、NaOH溶液、95%乙醇)。
设向量a=(1,-1),b=(m+1,2m-4),若ab,则m=______.
利用基因编辑技术将病毒外壳蛋白基因导入猪细胞中,然后通过核移植技术培育基因编辑猪,可用于生产基因工程疫苗。下图为基因编辑猪培育流程,请回答下列问题:
(1)对1号猪使用_________处理,使其超数排卵,收集并选取处在__________时期的卵母细胞用于核移植。
(2)采集2号猪的组织块,用__________处理获得分散的成纤维细胞,放置于37℃的CO2培养箱中培养,其中CO2的作用是________。
(3)为获得更多基因编辑猪,可在胚胎移植前对胚胎进行__________。产出的基因编辑猪的性染色体来自于_________号猪。
(4)为检测病毒外壳蛋白基因是否被导入4号猪并正常表达,可采用的方法有__________(填序号)。
①DNA测序 ②染色体倍性分析 ③体细胞结构分析 ④抗原—抗体杂交
如图甲所示,边长为 a 的正方形,四个顶点上分别固定一个电荷量为 的点电荷;在
区间, x 轴上电势
的变化曲线如图乙所示。现将一电荷量为
的点电荷 P 置于正方形的中心 O 点,此时每个点电荷所受库仑力的合力均为零。若将 P 沿 x 轴向右略微移动后,由静止释放,以下判断正确的是( )
A . ,释放后 P 将向右运动
B . ,释放后 P 将向左运动
C . ,释放后 P 将向右运动
D . ,释放后 P 将向左运动
抗战家书是一个民族泣血的记忆。有学者收藏到一封80多年前的家书,其中写道:“沪战两月,敌军死亡依情报所载,其数达五万以上。现在沪作战敌军海陆空军总数在廿万以上,现尚源源增援中,以现势观察,沪战纵有些微变化,决无碍整个计划”。经“沪战”一役( )。
A. 日军被迫三易主帅 B. 抗战自此进入战略相持阶段
C. 打破日本三个月灭亡中国的计划 D. 中国军队取得正面战场最大胜利-