基建经费拨付形式有（）。A、月决算 B、季决算 C、竣工后一次拨付 D、分段拨付 E、双方约

酿脓链球菌反复感染人体可引起风湿性心脏病。其主要原因是[ ]

A．机体免疫功能低下或缺失

B．外来抗原直接作用于机体某些组织

C．抗体与自身组织发生反应，引起过敏反应疾病

D．外来抗原与自身某些组织细胞有共同的或相似的抗原决定簇

小公司效应就是我们在股票投资风格管理中曾经提到的，以市场资本总额衡量的小型资本股票，它们的投资组合收益通常优于股票市场的整体表现。（）

Dutch treat is a late-nineteenth-century term, and it originally refers to a dinner where everyone is expected to pay for his own share of the food and drink. If people go “Dutch treat”, or simply “go Dutch”, it means that they will share the expenses of a social engagement.

There are many other “Dutch” expressions in English, many of which were invented in Britain in the seventeenth century, when the Dutch and the English were commercial and military rivals. The British used “Dutch” to refer to something bad, cheap and shameful. A “Dutch bargain” at that time was an uneven, one-sided deal; “Dutch reckoning” was an unitemized(未逐条记载的) account; and “Dutch widow” was slang for prostitute. Later centuries brought in “Dutch courage”, for bravery caused by drink; “Dutch concert”, for noisy music; “Dutch nightingale”, meaning a frog; and “double Dutch”, for incomprehensible language or talk.

Some of the expressions are still in use today, but some are not. In fact, in American English, some “Dutch” expressions have nothing to do with the Dutch, but something with the German. It was probably because of the similar spelling and pronunciation that people made a mistake in distinguishing between “Dutch” and “Deutsch” (the German word for German), when German immigrants came to America in the 1700s. For instance, “the Pennsylvania Dutch” refers to the German descendants, instead of the Dutch descendants, living in Pennsylvania.

小题1:Many of the “Dutch” expressions were invented with negative sense, because ___________.

A．The Dutch were underdeveloped people.

B．Britain and Holland were competitors at that time.

C．The Dutch had many bad habits.

D．The British were superior to the Dutch.小题2: With the information you get from Paragraph 2, make a guess at the meaning of the sentence “You are in Dutch”. It probably means ____________ .

A．You are in Holland.

B．You are welcome.

C．You are in trouble.

D．You are lucky.小题3:According to the passage, some native American “Dutch” expressions were related to the German instead of the Dutch, simply because ______________.

A．People hated the German as much as the Dutch.

B．People made a mistake at the beginning.

C．People made a joke about the German.

D．The German immigrants proclaimed that they were Dutch.

简述主动脉窦瘤的超声心动图表现。

三元组法和十字链表法都可以用于 ______矩阵的存储表示。