某小组探究大气压的特点。他们用三个相同的塑料杯、水、硬纸片进行实验,其实验过程和

题型:填空题

问题:

某小组探究大气压的特点。他们用三个相同的塑料杯、水、硬纸片进行实验,其实验过程和现象如图(a)、(b)、(c)所示。然后,换用不同的塑料杯重复实验,其实验过程和现象如图(d)、(e)所示。

 

⑴分析图(a)、(b)、(c),你认为图(c)中纸片下落的原因是: 

⑵分析比较图(b)、(d)、(e),可以得出的初步结论是:          

考点:大气压强的存在及应用
题型:填空题

少阳邪热内迫,肠胃俱病所致干呕而利,当选( )

A.小柴胡汤
B.黄苓加半夏生姜汤
C.半夏泻心汤
D.大黄甘草汤

题型:填空题

阅读理解。

     Teaching children to read well from the start is the most important task of elementary schools. But relying

on educators to approach this task correctly can be a great mistake. Many schools continue to employ

instructional methods that have been proven ineffective. The staying power of the "look-say" or "whole-word"

method of teaching beginning reading is perhaps the most flagrant example of this failure to instruct effectively.

     The whole-word approach to reading stresses the meaning of words over the meaning of letters, thinking

over decoding, developing a sight vocabulary of familiar words over developing the ability to unlock the

recommended by advocates of"open" classrooms and with the concept that children have to be developmentally

ready to begin reading. Before 1963, no major publisher put out anything but these"Run-Spot-Run" readers.

     However, in 1955, Rudolf Flesch touched off what has been called "the great debate" in beginning reading.

In his best-seller Why Johnny Can't Read, Flesch indicted(控诉)the nation's public schools for miseducating

students by using the look-say method. He said - and more scholarly studies by Jeane Chall and Rovert Dykstra

later confirmed - that another approach to beginning reading, founded on phonics, is far superior.

     Systematic phonics first teaches children to associate letters and letter combinations with sounds; it then

teaches them how to blend these sounds together to make words. Rather than building up a relatively limited

vocabulary of memorized words, it imparts a code by which the pronunciations of the vast majority of the

most common words in the English language can be learned. Phonics does not devalue the importance of

thinking about the meaning of words and sentences; it simply recognizes that decoding is the logical and

necessary first step.

1. The author indicts the look-say reading approach because ______.

A. it overlooks decoding

B. Rudolf Flesch agrees with him

C. he says it is boring

D. many schools continue to use this method

2. One major difference between the look-say method of learning reading and the phonics method is ______.

A. look-say is simpler

B. Phonics takes longer to learn

C. look-say is easier to teach

D. phonics gives readers access to far more words

3. The phrase "touch-off" (Para 3, Line 1) most probably means ______.

A. talk about shortly

B. start or cause

C. compare with

D. oppose

题型:填空题

十二指肠大 * * 位于十二指肠

A.水平部前壁
B.升部前壁
C.降部后内侧壁
D.降部后外侧壁
E.水平部后壁

题型:填空题

关于弯曲菌感染的流行病学特点,叙述正确的有()

A.人畜共患

B.主要经消化道传播

C.发病者主要为小于2岁的婴幼儿

D.在急性肠炎患者中,空肠弯曲菌检出率高

E.胎儿弯曲菌感染主要发生于机体免疫力低下患者

题型:填空题

影响光合作用的环境因素是什么?

 

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