计算45×(270+65÷5)时,应先算( )法,再算( )法,最后算( )法。

题型:填空题

问题:

计算45×(270+65÷5)时,应先算(    )法,再算(    )法,最后算(    )法。

考点:整数的四则混合运算及应用题
题型:填空题

在中华人民共和国境内从事公路的规划、建设、养护、经营、使用和管理,公路建设包括( )、公路隧道和公路渡口。

A.公路桥梁

B.公路环山道

C.河底公路

D.国道

题型:填空题

下列有关内联函数的叙述中,正确的是

A.内联函数在调用时发生控制转移

B.内联函数必须通过关键字inline来定义

C.内联函数是通过编译器来实现的

D.内联函数体的最后一条语句必须是return语句

题型:填空题

以下是设计的“探究种子萌芽的外界条件”实验请你帮他一起完成

(1)1号瓶没有萌发,是因为______.

3号瓶没有萌发,是因为______.

4号瓶没有萌发,是因为______.

(2)根据(1)的结论,请在表中2号瓶的空白处填上适当的内容.

(3)根据(1)的结论,你认为设置2号瓶的作用是______.

题型:填空题

初等教育的普遍实施出现在()。

A.第一次工业革命的基本完成

B.第二次工业革命的基本完成

C.第三次工业革命的基本完成

D.信息革命的出现

题型:填空题

Small, pink and very ugly. Hardly the qualities of a star, but they describe the deformed mouse that was the media darling at a recent science exhibition in Beijing. With a complex tissue structure in the shape of a human ear grafted on to its back, the rosy rodent was a stunning symbol of the serious strides China is making in the field of biotechnology.

China is fast applying the latest life-science techniques learned from the West to aggressively pursue genome research. It’s establishing its own centers of technical excellence to build a scientific base to compete directly with the United States and Europe. With a plentiful supply of smart young scientists at home and lots of interest abroad biotechnology is on the brink of a boom in China. And in the view of foreign scientists, Beijing is playing a clever hand, maximizing the opportunities open to them.

For the moment, the cooperation exists mostly with Europe and the U. S. But Asia’s other biotech leaders, Japan, Singapore and Korea, also are recognizing China’s potential as an attractive low-cost base to conduct research. These partnerships—and China’s advancement in the field of biotechnology—could help benefit the rest of Asia: China’s rapid progress in improving crop yields will address food-security concerns in the region. In addition, China is more likely to focus on developing cheap technology that its predominantly poor population and those of other Asian countries—can afford.

There remain, however, serious barriers to the development of a p biotech industry. Among them are a poor domestic legal framework, weak enforcement of intellectual-property rights and loose adherence to international standards. China is a signatory of the International Bio Safely Protocol, which should mean adherence to global standards governing the conduct of field trials. But some observers are skeptical. "The regulations look good, but I haven’t met one scientist who believes they are being fully adhered to," says a European science analyst.

If shortcuts are taken, then some of the recent scientific achievements trumpeted in the official press may never make it to market. But no matter how strict lab test are, other problems lie in wait. For example, there is a number of tasks it would take years to fulfill in the patents office, says one lawyer, leaving innovators with little protection if they take a product to market in China.

In the field of biotechnology China is thought to ().

A. have been making an utmost effort learning from the West

B. have become a country among the advanced

C. have been able to rival the United States and Europe

D. have launched a biotechnological revolution

更多题库