在Word中，将鼠标移到文档左侧的( )上，当鼠标指针变成向右倾斜的箭头形状时，单击鼠标可以选中一行，双击鼠标可选中一个段落。
【单选题】
临床诊断乳牙根尖周病不依赖于（ ）
A.
疼痛
B.
肿胀
C.
龋洞深度
D.
松动
E.
X线检查
手机使用
微信扫一扫
分享
参考答案
参考解析
【单选题】
苍耳子的主要不良反应是（）
导致精子产生和成熟发生障碍，抑制女性患者巢功能
恶心呕吐，腹痛腹泻，重者可见黄疸、肝肿大、消化道出血
直接作用于中枢神经系统，甚或因呼吸中枢完全麻痹而致死
血小板、白细胞、血红蛋白减少，并可发生急性粒细胞减少
心律失常，如心率减慢、早搏、房室传导阻滞
【单选题】
Passage 2
Several research teams have found that newborns prefer their mothers' voices over those of other people. Now a team of scientists has gone an intriguing step further: they have found that newborns cry in their native language."We have provided evidence that language begins with the very first cry melodies,"says Kathleen Wermke of the University of Wirzburg, Germany, who led the research.
"The dramatic finding of this study is that not only are newborns capable of producing different cry melodies, but they prefer to produce those melody patterns that are typical for the ambient language they have heard during their fetal life, within the last trimester,"said Wermke."Contraryto orthodox interpretations, these data support the importance of human infants' crying for seeding language development."
It had been thought that babies' cries are constrained by their breathing patterns and respiratory apparatus, in which case a crying baby would sound like a crying baby no matter what the culture is, since babies are anatomically identical."The prevailing opinion used to be that newborns could not actively influence their production of sound,"says Wermke. This study refutes that claim: since babies cry in different languages, they must have some control(presumably unconscious) over what they sound like rather than being constrained by the acoustical properties of their lungs, throat, mouth, and larynx. If respiration alone dictated what a cry sounded like, all babies would cry with a falling-pitch pattern, since that's what happens as you run out of breath and air pressure on the throat's sound-making machinery decreases. French babies apparently didn't get that memo."German and French infants produce different types of cries, even though they share the same physiology,"the scientists point out."The French newborns produce ' nonphysiological' rising patterns,"showing that the sound of their cries is under their control.
Although phonemes-speech sounds such as "ki"or"sh"-don't cross the abdominal barrier and reach the fetus, so-called prosodic characteristics of speech do. These are the variations in pitch, rhythm, and intensity that characterize each language. Just as newborns remember and prefer actualsongs that they heard in utero, it seems, so they remember and prefer both the sound of Mom's voice and the melodic signature of her language.
The idea of the study wasn't to make the sound of a screaming baby more interesting to listeners-good luck with that-but to explore how babies acquire speech. That acquisition, it is now clear, begins months before birth, probably in the third trimester. Newborns "not only have memorized the main intonation patterns of their respective surrounding language but are also able to reproduce these patterns in their own [ sound] production,"conclude the scientists. Newborns'"cries are already tuned toward their native language", giving them a head start on sounding French or German (or, presumably, English or American or Chinese or anything else: the scientists are collecting cries from more languages). This is likely part of the explanation for how babies develop spoken language quickly and seemingly without effort. Sure, we may come into the world wired for language(thank you, Noam Chomsky), but we also benefit from the environmental exposure that tells us which language.
Until this study, scientists thought that babies became capable of vocal imitation no earlier than12 weeks of age. That's when infants listening to an adult speaker producing vowels can parrot the sound. But that's the beginning of true speech. It's sort of amazing that it took this long for scientists to realize that if they want to see what sounds babies can perceive, remember, and play back, they should look at the sound babies produce best. So let the little angel cry: she's practicing to acquire language.
When does language acquisition begin according to the research?
It begins with the birth of a baby.
It begins before the birth of a baby.
It begins when a baby starts imitating adults' speech.
It begins with a baby's cry melodies typical of its mother tongue.
【单选题】
患者，男，70岁。发热，咳嗽1周。查体：体温38℃，血压80/50mmHg(10.6/6.7kPa)，左肺下可闻及湿啰音。下列哪项处理是错误的
吸氧
药物降温
补充血容量
纠正酸中毒
使用血管活性药物
