在我国经济运行中，对资源配置起基础性作用的应该是A．计划 B．金融 C．市场 D．财

图示干细胞的三个发育途径。据图回答下列问题：

(1)由A细胞形成的B细胞仍然保持着其特有的______和______能力，A细胞到C细胞的过程是由______控制的。

(2)若D细胞是胰腺细胞，则结构⑦所起的作用是_________。

(3)A细胞分化成D细胞的根本原因是__________。

(4)若D细胞是正在衰老的细胞，该细胞中结构⑧发生的变化是_____________。

中标人不按照与招标人订立的合同履行义务，情节严重的，要取消()并予以公告，直至由工商行政管理机关吊销营业执照。

A．1年至3年的投标资格

B．2年至3年的投标资格

C．1年至5年的投标资格

D．2年至5年的投标资格

The component of the healthy personality that is the first to develop is the sense of trust. As with other personality components, the sense of trust is not something that develops independent of other manifestations of growth. It is not that infants learn how to use their bodies for purposeful movement, learn to recognize people and objects around them, and also develop a sense of trust. Rather, the concept "sense of trust" is a shortcut expression intended to convey the characteristic flavor of all the child’s satisfying experiences at this early age.

Studies of mentally ill individuals and observations of infants who have been grossly deprived of affection suggest that trust is an early-formed and important element in the healthy personality. Psychiatrists find again and again that the most serious illnesses occur in patients who have been sorely neglected or abused or otherwise deprived of love in infancy.

Observations of infants brought up in emotionally unfavorable institutions or moved to hospitals with inadequate facilities for psychological care support these findings. A recent report says that "Infants under 5 months of age who have been in an institution for some time present a well-defined picture. The outstanding features are listlessness, relative immobility, quietness, poor sleep, an appearance of unhappiness, etc. " Another investigation of children separated from their mothers at 6 to 12 months and not provided with an adequate substitute comes to much the same conclusion.

Most significant for our present point, these reactions are most likely to occur in children who, up to the time of separation at 6 to 9 months of age, had a happy relation with their mothers, while those whose relations were unhappy are relatively unaffected. It is at about this age that the struggle between trusting and mistrusting the world comes to a climax, for it is then that children first perceive clearly that they and their environment are things apart. That at this point formerly happy infants should react do badly to separation suggests, indeed, that they had a faith that now has been shattered.

In most primitive societies and in some sections of our own society, the attention accorded infants is more in line with natural processes. Throughout infancy the baby is surrounded by people who are ready to feed it, fondle it, and otherwise comfort it at a moment’s notice. Moreover, these ministrations are given spontaneously and wholeheartedly, and without that element of nervous concern that may characterize the efforts of young mothers made self-conscious and insecure by our scientific age.

We must not exaggerate, however. Most infants in our society too find smiles and comfort. As their own bodies come to be more dependable, there is added to the pleasures of increasing sensory response and motor control the pleasure of the mothers’ encouragement. Then, too, psychologists tell us that mothers create a sense of trust in their children not by the particular techniques they employ but by the sensitiveness with which they respond to the children’s needs and by their overall attitude.

The sense of trust in an infant is under development when ().

A. the infant experiences some satisfaction

B. adults’ trust is adequate

C. the infant learns how to move

D. the infant is surrounded by people he can recognize

心肌梗塞

关于传动系统下列说法正确的是：（）

A.当制动时没踩下离合器踏板，当惯性力矩超过了离合器允许的最大摩擦力矩时，离合器主、从动部分就相对滑转

B.没有离合器切断动力传输，手动挡轿车无法起动发动机

C.在自动变速器中，当行星架被固定，太阳轮输入时，齿圈旋转方向与太阳轮反向

D.由于轴间差速器的存在，当左边车轮打滑时，右侧车轮能正常驱动车轮