若3,2,x,5的平均数是4,那么x等于( ) A.8 B.6 C.4 D.2

题型:选择题

问题:

若3,2,x,5的平均数是4,那么x等于(  )

A.8

B.6

C.4

D.2

考点:平均数
题型:选择题

Hip hop or rap (说唱) music started on the street and in the clubs of the New York City in the 1970s. People rap to express how they feel about their lives and problems.

Rapping in class.

Would you like to rap in class? Well, actually hip pop music is played in more than 10,000 schools in the USA. Why? There is a new school program called “Flocabulary” in which teachers use texts and hip hop CDs to help teach different school subjects. The words of the songs are just what students are studying. This makes learning easy and fun. Students and teachers are excited about the good results it has had on exam marks. Mr. Lee, a teacher in a high school, said, “I’ve used hip hop songs in class, and I have never seen my students so crazy about history! You can’t imagine how well they remember what I teach! We even try to write our own songs.”

Whose idea was Flocabulary?

Blake Harrison, a high school student, was the first person to come up with the idea of Flocabulary. The word “Flocabulary” comes from the word “flow” and “vocabulary”. “Flow” is a rap word for “style”, or the way a rapper says the words of a song. “Vocabulary” means the words you have to learn in a language. How did he get the idea? Well, he realized he could remember the words of a hip hop song very easily. So, why not make lessons into songs? Today together with Alex Rappaport, a song writer, Blake produces hip hop songs for math, science and literature (文学). They are now used in schools with great success.

小题1: Rap music started ______ in the New York City in the 1970s.

A.in a high school

B.in a music class

C.on the street

D.in a CD shop小题2:From the passage, we can learn “Flocabulary” is a program to ______.

A.write rap music

B.remember the words of a song

C.write our own songs

D.help teach school subjects小题3:Blake has produced hip hop sings for school subjects EXCEPT ______.

A.math

B.history

C.science

D.Literature

题型:选择题

某植物的光合作用和细胞呼吸最适温度分别为25℃和30℃,下图为该植物处于25℃环境中光合作用强度随光照强度变化的坐标图。下列叙述正确的是

[ ]

A.a点时叶肉细胞的生理活动只受温度的影响

B.b点时植物才开始进行光合作用

C.若将温度从25℃提高到30℃时,a、d点均上移

D.c点时该植物的O2产生量为V1-V2

题型:选择题

MRPⅡ的特点()

A、计划的一贯性和可行性

B、数据的共享性

C、动态应变性

D、物流和资金流的统一性

题型:选择题

男,35岁,尿频、尿痛、尿急一年,超声检查可见左肾略大,实质区可见多个大小不等无回声暗区及其后伴有声影的强回声光团,其无回声暗区相互交通并与肾盂相通,左输尿管全程扩张,膀胱壁弥漫性增厚、僵硬,容积明显缩小,应诊断为()

A.急性肾盂肾炎

B.肾癌

C.肾积水

D.肾囊肿

E.肾结核

题型:选择题

易燃、易爆、特殊环境建筑物的测试应注意哪些事项?

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