逆变角太大会造成逆变失败()

题型:判断题

问题:

逆变角太大会造成逆变失败()

考点:动力与电气工程电力拖动与控制系统电力拖动与控制系统题库
题型:判断题

氢化钙(CaH2)是一种重要的制氢剂,与水接触时,发生反应生成氢氧化钙和氢气。

小题1:写出该反应的化学方程式。

小题2:若需要40 g氢气,计算至少需要消耗氢化钙的质量。

题型:判断题

患者男,53岁,因“腹胀,尿黄1个月,畏寒、发热3d”来诊。患者HBsAg阳性38年,氨基转移酶反复升高。查体:T38.9℃,P98次/min;肝掌,巩膜轻度黄染;腹壁静脉显露,腹部高度膨隆,压痛,肝触诊不满意,脾肋下5cm,质硬,移动性浊音(+);双下肢轻度水肿,无扑翼样震颤。

为明确再次高热的原因,首先应做的实验室检查是()

A.颅脑CT

B.血普通细菌学检查

C.连续行痰、血真菌涂片和培养

D.血厌氧菌培养

E.骨髓培养

F.肝功能检测

题型:判断题

Ⅲ 阅读(共两节。满分40分)

第一节 阅读理解(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。

The idea about the phoenix goes back to Ancient Egypt, where we find the phoenix described as a handsome, eagle-like bird, with part-golden, part-red plumage, that spent most of its life in the Arabian deserts. It was rarely seen and according to one version of the story, only appeared in Egypt once every five hundred years, when it flew to Heliopolis, “city of the sun”, and deliberately burnt itself to ashes by settling on the altar(祭坛) flame there! However, it seems it did not really die because from those same ashes a young, fully formed phoenix was born and flew away, apparently back to Arabia.

It is pretty obvious that no one has ever seen or will see a living phoenix. The interesting thing is that we can find certain clues which may explain one aspect of the Egyptians’ idea. It may sound unbelievable, but some birds are apparently quite charmed by flames and small fires, especially members of the crow family. One zoologist actually proved this by setting fire to some straw near to a tame(驯养的) rook. Far from becoming nervous and backing away, the bird deliberately stood over the flames, with raised and vibrating wings. It didn’t get burnt, but the image it presented by its strange behavior was almost exactly like that shown in illustrations of the mythical phoenix!

Why birds should occasionally behave in this strange way is not clear. One idea is that they carefully use the heat of the flames to relieve the annoyance caused by their feather mites(虱) which all birds have. Whatever the reason, it is quite possible that the Ancient Egyptians saw birds behaving in this way, from time to time, and used it as the basis of their phoenix myth, adding fanciful details which closely linked it to their worship of the sun and their belief in resurrection.

Nowadays, the phoenix is much less important to us than it was to the Egyptians. But the logo of modern fire insurance companies, which employ the phoenix as one of their symbols, refers that in one sense the idea of it remains.  

41. According to the passage, the phoenix ______________ .

A. is a handsome and eagle-like bird living in Arab

B. used to be seen when the Egyptians held religious activities

C. has never really existed in the world

D. is the king of all kinds of birds

42. The reason why birds stand above flames is probably that _____________ .

A. the phoenix used to do so

B. they may get rid of the mites

C. they want to burn their feather

D. they can heat themselves

43. Which of the following statements is NOT correct?

A. The ancient Egyptians worshiped the phoenix.

B. The scientists have discovered why birds are attracted by fire.

C. The modern people still favor the idea of the phoenix.

D. The mythical tales about the phoenix were based on facts.

44. Which of the following is closest to “resurrection” in the 3rd paragraph?

A. living forever        B. offering warmth        C. coming back to life          D. staying healthy

45. What does the phoenix probably mean in the logo of a fire insurance company?

A. Our company can protect you from being harmed by fire.

B. If your property is destroyed by fire, we will help you build it up again.

C. Our company will always be energetic and wealthy.

D. If needed, we will save you at the risk of losing lives.

题型:判断题

患者,男,45岁。素嗜辛辣刺激性食品,齿衄血色鲜红,齿龈红肿疼痛,头痛,口臭,舌红,苔黄,脉滑数。诊为胃火炽盛之齿衄。方选

A.白虎汤合增液汤
B.加味清胃散合泻心汤
C.调胃承气汤合十灰散
D.滋水清肝饮合茜根散
E.黄连解毒汤合五味消毒饮

题型:判断题

大多数抗恶性肿瘤药物所共有的不良反应()

A.脱发

B.骨髓抑制

C.心脏损害

D.胃肠道反应

E.肝、肾损害

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