一个正确的三段论，中项至少周延几次？（）A、0.0 B、1.0 C、2.0 D、3.0

Stop! You can never touch this machine when it ________, it is very dangerous.

A．has been operated

B．will be operated

C．is operated

D．is being operated

开展国际营销的企业一旦在某国外市场建立了一套广泛的销售网络并取得销售的显著增长，就应该在国外市场上采取与本国类似的营销策略。因此，在开创初期，或在才建立了销售代表处的国外市场上，需采取与本国不同的营销策略。 以下哪项如果为真，则最能支持文中结论

A．国外市场与本国市场上的销售网络可以完全相同。

B．广泛的销售网要优于不发达的销售网。

C．某些国家经济比其他国家发展迅速。

D．比较起来，大型的国外市场比小型的更能适应本国营销策略。

E．研究市场营销必须充分考虑不同市场上广告的适应能力。

Few people doubt the fundamental importance of mothers in child-rearing, but what do fathers do Much of what they contribute is simply the result of being a second adult in the home. Bringing up children is demanding, stressful and exhausting. Two adults can support and make up for each other’s deficiencies and build on each other’s strengths.

Fathers also bring an array of unique qualities. Some are familiar: protector and role model. Teenage boys without fathers are notoriously prone to trouble. The pathway to adulthood for daughters is somewhat easier, but they must still learn from their fathers, in ways they cannot from their mothers, how to relate to men. They learn from their fathers about heterosexual trust, intimacy and difference. They learn to appreciate their own femininity from the one male who is most special in their lives. Most important, through loving and being loved by their fathers, they learn that they are love-worthy.

Current research gives much deeper—and more surprising—insight into the father’s role in child-rearing. One significantly overlooked dimension of fathering is play. From their children’s birth through adolescence, fathers tend to emphasize play more than caretaking. The father’s style of play is likely to be both physically stimulating and exciting. With older children it involves more teamwork, requiring competitive testing of physical and mental skills. It frequently resembles a teaching relationship: come on, let me show you how. Mothers play more at the child’s level. They seem willing to let the child direct play.

Kids, at least in the early years, seem to prefer to play with daddy. In one study of 2.5-year-olds who were given a choice, more than two-thirds chose to play with their father.

The way fathers play has effects on everything from the management of emotions to intelligence and academic achievement. It is particularly important in promoting self-control. According to one expert, "children who roughhouse with their fathers quickly learn that biting, kicking and other forms of physical violence are not acceptable. " They learn when to "shut it down. "

At play and in other realms, fathers tend to stress competition, challenge, initiative, risktaking and independence. Mothers, as caretakers, stress emotional security and personal safety. On the playground fathers often try to get the child to swing even higher, while mothers are cautious, worrying about an accident.

We know, too, that fathers’ involvement seems to be linked to improved verbal and problem-solving skills and higher academic achievement. Several studies found that along with paternal strictness, the amount of time fathers spent reading with them was a p predictor of their daughters’ verbal ability.

For sons the results have been equally striking. Studies uncovered a p relationship between fathers’ involvement and the mathematical abilities of their sons. Other studies found a relationship between paternal nurturing and boys’ verbal intelligence.

Which of the following statements is true().

A. Mothers tend to stress personal safety less than fathers.

B. Boys are likely to benefit more from their fathers’ caring.

C. Girls learn to read more quickly with the help of their fathers.

D. Fathers tend to encourage creativeness and independence.

陈旭麓教授认为真正的通史应该是社会史。

实验证明，复烤烟叶的吸湿性（）原烟的吸湿性，这可能与原烟经过复烤后，细胞的物料化学状态发生变化有关。