主管生长发育是气的()。 A.推动作用 B.温煦作用 C.防御作用 D.固摄作用 E

题型:单项选择题

问题:

主管生长发育是气的()。

A.推动作用

B.温煦作用

C.防御作用

D.固摄作用

E.中介作用

考点:中西医结合执业助理医师精、气、血、津液、神精、气、血、津液、神题库
题型:单项选择题

分布在面额部的经脉是()

A.太阳经

B.阳明经

C.少阳经

D.厥阴经

E.太阴经

题型:单项选择题

In 1998 consumers could purchase virtually anything over the Internet. Books, compact discs, and even stocks were (1) from World Wide Websites that seemed to (2) almost daily a few years earlier, some people had predicted that consuners accustomed to shopping in stores would be (3) to buy things that they could not see or touch (4) . For a growing number of time-starved consumers, however, shopping from their home computer was proving to be a convenient (5) to driving to the store.

A research estimated that in 1998 US consumers could purchase $ 7.3 billion of goods over the Internet, double the 1997 total. Finding a bargain was getting easier, (6) the rise of online auctions and Websites that did comparison shopping on the Internet for the best (7) .

For all the consumer interest, (8) in eyberspaee was still a largely (9) business, however. Internet pioneer Amazon. eom, which began selling books in 1995 and later (10) into recorded music and videos, posted (11) of $ 153.7 million in the third quarter, up from $ 37.9 million in the same period of 1997. Overall, (12) , the company’ s loss widened to $ 45.2 million from $9.6 million, and analysts did not expect the company to turn a profit (13) 2001. (14) the great loss, Amazon. tom had a stock market value of many billions, reflecting investors’ (15) about the future of the industry.

Internet retailing appealed (16) investors because it provided an efficient means for reaching millions of consumers without having the cost of operating (17) stores with their armies of salespeople. Selling online carried its own risks, however, (18) so many companies competing tor consumers’ attention, price competition was (19) and profit (20) thin or nonexistent.

18()

A.for

B.despite

C.to

D.with

题型:单项选择题

已知等差数列{an}满足a2+a5=3,则S6的值为(  )

A.6

B.9

C.12

D.24

题型:单项选择题

定量地反映土的渗透性大小的参数是()。

题型:单项选择题

在氮源为14N的培养基上生长的大肠杆菌,其DNA分子均为14N—DNA(对照);在氮源为15N的培养基上生长的大肠杆菌,其DNA分子均为15N—DNA(亲代)。将亲代大肠杆菌转移到含14N的培养基上,再连续繁殖两代(Ⅰ和Ⅱ),用某种离心方法分离得到的结果如图所示:

由实验结果可推测第一代(Ⅰ)细菌DNA分子中一条链含();另一条链含()。

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