在真空中有两点电荷,若它们的电量都增加到原来的2倍、它们的距离减小到原来的1/2

题型:选择题

问题:

在真空中有两点电荷,若它们的电量都增加到原来的2倍、它们的距离减小到原来的1/2,则它们之间的作用力将是原来的[ ]

A.1/4

B.不变

C.4倍

D.16倍

考点:库仑定律
题型:选择题

下列属于青年消费者的心理特征表现的是()。

A.购买有主见,不受外界影响

B.理智性胜于冲动性

C.追求科学与实用

D.计划性多于盲目性

题型:选择题

下列哪项药物对胃、十二指肠黏膜损害最严重()

A.保泰松

B.非甾体抗炎药

C.肝素

D.吲哚美辛

E.水杨酸

题型:选择题

The doctor-patient relationship is one of the (1) relationships in life, but many people say this relationship is beyond (2) . Can this relationship be saved The answer is (3) yes, because it must. And if that is lost, medicine becomes a technology and is (4) . In part the crisis in medicine began with doctors (5) themselves from patients.
The more critical work of a doctor happens in the taking of the human (6) . (7) is the most important and most difficult single transaction. The studies show that (8) of all the valuable information that leads to correct diagnosis comes from the history. Another (9) comes from the physical examination, 10% comes from simple (10) tests, and 5% comes from all the complex (11) . So listening is vital, because listening is not merely listening, but to establish a (12) .
But some doctors think listening is (13) . They like to use complex and costly (14) , and use (15) that create adverse reactions and require (16) . They don’t like to listen. Because there’s no premium on listening and that there’s no (17) for listening.
Even so, the doctor-patient relationship is not (18) saving. Because people may ask, what is good health And good health begins first and foremost with (19) . If you don’t care for a (20) , be somebody else, but don’t be a doctor!

题型:选择题

______是指航空货运代理公司把若干单独发运的货物组成一整批货物,用一份总运单整批发运到同一到站;或者运交某一预定的代理收货,然后再报关,分拨后交给实际收货人的运输方式。

A.班机

B.整架包机

C.集中托运

D.部分包机

题型:选择题

杯状细胞常见于()。

A.单层扁平上皮

B.单层柱状上皮

C.复层扁平上皮

D.单层立方上皮

E.变移上皮

更多题库