关于期前收缩,错误的是() A.在规则心律基础上,突然提前出现一次心跳 B.提前出现

题型:单项选择题

问题:

关于期前收缩,错误的是()

A.在规则心律基础上,突然提前出现一次心跳

B.提前出现的心跳后有一较长间歇

C.连续每一次窦性搏动后出现一次期前收缩称二联律

D.连续每一次窦性搏动后出现两次期前收缩称为三联律

E.连续每两次窦性搏动后出现一次期前收缩称为三联律

考点:眼科(医学高级)诊断学基础诊断学基础题库
题型:单项选择题

对于人均资源相对短缺的中国来说,如何实现资源的优化配置显得尤其重要。在社会主义市场经济中,资源配置主要是通过( )

A.进出口贸易来实现的

B.政府宏观调控来实现的

C.价格机制来实现的

D.银行信贷来实现的

题型:单项选择题

把标有“220V,100W”的白炽灯接在220V的交流电源下,下列说法中正确的是( )

A.交流电压有效值是220V,灯丝电阻是484Ω

B.交流电压最大值是311V,灯丝电阻是968Ω

C.交流电压有效值是220V,电流有效值是0.45A

D.交流电压最大值是311V,电流最大值是0.45A

题型:单项选择题

Directions:Complete the following passage by filling in each blank with one word that best fits the

context.

     On May 2nd,  1933, the Lorch Ness Monster, known as Nessie, was introduced by a newspaper to

the world for the first time after Mrs Aldie Machay described her sighting of a whalelike creature in Lorch Ness in April. From   1.________   on, news about the monster appeared in the media from time to time.

     Lorch Ness is a lake in northen Scotland. As   2.________   largest fresh water lake in Britain, it can

be a possible living place for large creatures.

     Nessie is said to have a long neck, a horselike head with a dark or grey coloured body.   3.________  is supposed to be about 15 to 40 feet long and 1,134 kilograms in weight. As   4.________   as the

6th century, people recorded sightings of a big monster in Lorch Ness.   5.________   Mrs Machay's

description of the sighting in 1933, the public didn't pay much attention.   6.________   the photos of the monster, the one taken in 1934 by a doctor is the most famous.   7.________   people found out in 1993

that the photo was fake(假的).

     In recent years, even  8.________   the help of more advanced equipment, scientists haven't yet

collected evidence to make people believe that Nessie is real.

题型:单项选择题

关于左冠脉异常起源于肺动脉的超声表现,错误的是

A.左冠脉开口于肺动脉

B.右心室扩大

C.左室节段性运动异常

D.左冠脉与肺动脉间左向右分流

E.分流主要发生在舒张期

题型:单项选择题

水中桥墩中心位置的测设一般采用()进行。

A.极坐标法

B.直角坐标法

C.距离交会法

D.角度交会法

更多题库