下列关于对虾烂眼病症状与病理变化情况描述不正确的是() A.发病初期眼球肿胀,颜色逐

题型:单项选择题 A1型题

问题:

下列关于对虾烂眼病症状与病理变化情况描述不正确的是()

A.发病初期眼球肿胀,颜色逐渐由黑变褐,并进一步发展为眼球溃烂

B.严重者眼球脱落仅剩下眼柄,细菌侵入血淋巴,使病虾血淋巴液变稀薄,凝固缓慢

C.病虾伏于水草或池边,基本不动

D.镜检可见眼球溃烂组织中含有大量细菌,最终患菌血症死亡

考点:执业兽医(水生动物类)考试水生动物疾病学水生动物疾病学题库
题型:单项选择题 A1型题

如图所示的装置,U1是加速电压,紧靠其右侧的是两块彼此平行的水平金属板.板长为l,两板间距离为d,一个质量为m、带电量为-q的粒子,经加速电压加速后沿金属板中心线水平射入两板中,若两水平金属板间加一电压U2,当上板为正时,带电粒子恰好能沿两板中心线射出;当下板为正时,带电粒子则射到下板上距板的左端1/4处,求:

(1)为多少?

(2)为使带电粒子经U1加速后,沿中心线射入两金属板,并能够从两板之间射出,两水平金属板所加电压U2应满足什么条件?

题型:单项选择题 A1型题

网络团购作为一种新兴的电子商务模式,是消费者通过网络获得或发布想要团购商品的意向,并通过网络征集有共同意向的消费者联合起来,以增强与商家的谈判能力,以求得最优价格的一种购物方式。而商家通过网站征集消费者团体,缩短交易渠道,加快出货速度,降低经营成本,获得竞争优势

结合信息分析网络团购运营模式兴起的经济学依据(8分)

题型:单项选择题 A1型题

患者,女性,38岁,上腹部疼痛2个月。腹痛多于餐后3~4小时发生,进食后可缓解。过去2年每到秋冬季均有发作,经胃镜检查确诊为十二指肠溃疡。

本病主要的致病菌是()

A.溶血性链球菌

B.葡萄球菌

C.幽门螺杆菌

D.伤寒杆菌

E.大肠埃希菌

题型:单项选择题 A1型题

A winter wonderland on the outskirts of Quebec City has become one of Canada's hottest attractions and most sought out accommodations. Guests stay close for warmth in sleeping bags on beds of ice, hats pulled over their ears to prevent frostbite, while sipping cocktails (鸡尾酒) in glasses also made of ice.

A cool place to host a memorable wedding or for a romantic getaway, the Quebec Ice Hotel has attracted 600,000 curious tourists, including 30,000 who stayed overnight, since opening seasonally 11 years ago. Like Victoria and Jeremy Martin, dozens of couples will exchange vows (誓约) this winter in a temporary church next to the hotel, made entirely from blocks of ice with seats covered in furs.

Average temperatures fall below minus 20 degrees C (minus four F) in winter, but inside the hotel's 36 rooms it is relatively comfortable. Thick walls of packed snow and ice act as an insulator, trapping body heat inside. Each room is uniquely decorated, using designs created by Quebec architecture students. Two hotel bars also sell special cocktails in ice glasses.

First-time guests of the hotel, however, are recommended to stay only one night as sleeping in sub-zero temperatures is not very refreshing. This year for the first time the ice hotel has teamed up with a brick and concrete Quebec City hotel to offer packages(全套服务) for one-night accommodations at each. Prices for one night only at the ice hotel start at 200 US dollars per person.

The 3,000-square-metre (32,300-square-feet) buildings take six weeks starting in December to build, using 15,000 tons of snow and 500 tons of ice, at a cost of some 750,000 US dollars. Eleven weeks after its seasonal grand opening, the hotel will close on March 27 and then melt away with the arrival of spring.

小题1:What is true with the ice hotel?

A.630,000 people have visited it.

B.Its rooms all look alike.

C.It stays open for two months each year.

D.Wedding ceremonies are often held there.小题2:The underlined word “insulator” in Paragraph 3 possibly refers to something that ______.

A.stops heat passing through it

B.collects and reflects light and heat

C.makes things become very cold

D.works like an air-conditioner小题3:First-time guests are advised to stay there only one night because _______.

A.they may not be able to stand the cold

B.their other night is with an ordinary hotel

C.new guests have no advantages over old ones

D.they may find the beds made of ice too hard to sleep on.

题型:单项选择题 A1型题

* * 检查的最佳时间是

A.经前7~10天

B.经后7~10天

C.经后1~2天

D.经前1~2天

E.月经期

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