如图所示为某辆赛车启动过程的频闪照片,该赛车从赛道的起点处(车头所对的零刻度线位

题型:填空题

问题:

如图所示为某辆赛车启动过程的频闪照片,该赛车从赛道的起点处(车头所对的零刻度线位置)由静止开始出发,同时,照相机开始拍照(如图甲所示),以后赛车沿直线向右运动的过程中,照相机每隔0.2s曝光一次(如图乙所示).

仔细观察频闪照片,如果赛车照此规律从起点运动1.0s到达E处.请你认真思考后完成:

(1)填写表格中所缺的三个数据(不需要估读)

(2)分析在这段时间内赛车通过的路程和时间的关系,可知路程和_____成正比.

考点:变速运动长度的测量及刻度尺的使用
题型:填空题

阅读理解。

     根据短文内容,判断句子正(T)误(F)。

     Maria is an English girl.  She is ten years old.  She is in Shanghai with her parents.  She studies in a

middle school(中学).She is in Class Six, Grade Seven.  Maria's father is our Chinese teacher.He is a

Beijing Opera fan.  He often goes to see Beijing Opera with Maria. And Maria likes Beijing Opera, too.

She thinks it is very interesting. She also thinks she can learn about Chinese history. But Maria's mother

doesn't like Beijing Opera.  She thinks it is very boring.  She likes comedies.  She thinks they are very

exciting.

( )1. Maria is in England now.    

( )2. Maria's mother is a Beijing Opera fan.    

( )3. Maria's mother is our English teacher.    

( )4. Maria also likes Beijing Opera.    

( )5. Maria's mother likes comedies.

题型:填空题

孕妇,26岁,孕1产0,40周妊娠,宫缩开始于当日零时,上午10点宫口开全,并自然破膜,羊水Ⅰ度混浊。11:30分检查,胎头后囟在左后方,矢状缝与左斜径相一致,触不到前囟,胎头最低点达坐骨棘水平。估计胎儿重3200g,胎心率132次/分,宫缩持续40秒,间歇2-3分钟

下列哪项是正确的:()

A.先露胎头已达骨盆出口

B.胎儿窘迫

C.属于胎头内旋转异常

D.宫缩乏力,应该设法增强宫缩

E.滞产

题型:填空题

会导致前庭沟处小溃疡的是

A.基托边缘过长或过锐
B.基托变形
C.基托与黏膜不密合
D.人工后牙覆盖过小
E.垂直距离过低

题型:填空题

小麦分蘖呈喇叭口状的日期是()。

A.小喇叭口期

B.大喇叭口期

C.分蘖消亡日期

D.有效分蘖期

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什么是《粮食流通管理条例》中规定的粮食收购?

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