集成电路中的元件具有以下特点()。 A.元件的性能一致 B.对称性好 C.不适于作差

题型:多项选择题

问题:

集成电路中的元件具有以下特点()。

A.元件的性能一致

B.对称性好

C.不适于作差动放大电路

D.制造三极管比制造电阻多用硅片

E.电容是PN结的结电容

考点:矿井维修电工矿井维修电工(高级)矿井维修电工(高级)题库
题型:多项选择题

下图表示人体通过体液免疫消灭破伤风杆菌外毒素的过程,下列相关叙述错误的是:

[     ]

A.细胞2、细胞3均起源于造血干细胞

B.仅细胞4中含有合成物质a的基因

C.②、③过程与细胞膜上蛋白质有关

D.细胞5属于保留分裂能力的细胞

题型:多项选择题

下列关于动物先天性行为的叙述中,错误的是[ ]

A.是所有动物都具有的行为

B.是动物生来就有的行为

C.是可遗传的

D.是不可遗传的

题型:多项选择题

In one sense, we can trace all the problems of the American city back (91) a single starting point: we Americans don’t like our cities very much.
That is, on the (92) of it, absurd. After all, more than three-fourths of us now live in cities, and more are (93) to them every year. We are told that the problems of our cities are (94) more attention in Washington, and scholarship has discovered a whole new (95) in urban studies.
(96) , it is historically true: in the American psychology, the city has been a basically suspect institution, (97) with the corruption of Europe, totally lacking that sense of spaciousness and innocence of the (98) and the rural landscape.
I don’t pretend to be a scholar on the history of the city in American life. But my thirteen years in public (99) , first as an officer of the U. S. Department of Justice, then as Congressman, and now as Mayor of the biggest city in America have taught me (100) too well the fact that a p antiurban attitude (101) consistently through the mainstream of American thinking. Much of the (102) behind the settlement of America was in reaction (103) the conditions in European industrial centers and much of the theory (104) the basis of freedom in America was linked directly to the availability of land and the perfectibility of man outside the corrupt influences of the city.
What has this to do with the predicament of the modern city I think it has (105) to do with it. For the fact is that the United States (106) the federal government, which has historically established our national priorities, has simply never thought that the American city was "worthy" of (107) —at least not to the (108) of expending any basic resources on it.
Antipathy to the city predates the American experience. When industrialization (109) the European working man into the major cities of the continent, books and pamphlets appeared (110) the city as a source of crime, corruption, filth, disease, vice, licentiousness, subversion, and high prices.

A.extent

B.range

C.degree

D.level

题型:多项选择题

临床资料:男,26岁,常规体检,HBsAg(-),AFP、CEA正常。

超声综合描述:肝右叶可见1.4cm×1.0cm增强回声区,边界清晰,CDFI:内未见动静脉血流信号。

超声提示()

A.肝癌

B.肝血管瘤

C.肝转移癌

D.肝腺瘤

题型:多项选择题

下列叙述中正确的是()。

A.顺序存储结构的存储一定是连续的,链式存储结构的存储空间不一定是连续的

B.顺序存储结构只针对线性结构,链式存储结构只针对非线性结构

C.顺序存储结构能存储有序表,链式存储结构不能存储有序表

D.链式存储结构比顺序存储结构节省存储空间

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