题目内容
（请给出正确答案）
A、Students should do more role-playing activities.
B、Teachers are supposed to present close-ended sentences.
C、Teachers should promote open dialogues.
D、Students are encouraged to conduct interviews with the guidelines written out.
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更多“Determine which of the followi…”相关的问题
The passage is mainly discussing______.
A．the necessity of social change
B．certain factors that determine the case with which social change occur
C．the way to slow down social change
D．how to promote social change
A、If h(t) is the impulse response of an LTI system and h(t) is periodic and nonzero, the system is unstable.
B、If a discrete-time LTI system has an impulse response h[n] of finite duration, the system is stable
C、If an LTI system is causal, it is stable
D、A continuous-time LTI system is stable if and only if its impulse response h(t) is absolutely integrable.
A、reproduce the gene of protein in eukaryotic cell.
B、determine those introns within the pre-mRNA.
C、study the regulation region for a inducible gene.
D、express eukaryotic genes in prokaryotes.
Determine the maximum tensile stress
and maximum compressive stress
due to the load P acting on the simple beam AB (see fgure). (a) Data are P = 6.2 kN , L = 3.2 m , d = 1.25 m , b = 80 mm , t = 25 mm , h =120 mm , and
= 90 mm . (b) Find the value of d for which tensile andcompressive stresses are the largest. What are these stresses？
Suppose the U.S. government were able to determine which industries will grow most rapidly over the next 20 years．Why doesn't this automatically mean that the nation should have a policy of supporting these industries' growth？
A、
This displacement formula still work.
B、The primary structure set up for the calculation of desired displacement should be the same one that has been used to determine internal forces in the original structure.
C、The primary structure set up for the calculation of desired displacement don't need to be the same one that has been used to determine internal forces in the original structure.
D、We can choose any primary structure for the original structure to calculate the desired displacement because all primary structures have the same internal forces and displacement with the original structure's.
According to the passage, an important limitation of relativity theory is that
A．it fails to describe space on a non-local level, complicating attempts to determine the geometrical model of the universe
B．it cannot account for the possibility that the universe may be multiply- connected instead of singly-connected
C．it yields inconsistencies in spatial topology equations, discriminating unnecessarily between the torus and the plane
D．it creates the illusion that observable space is curved, when in fact the universe may be Euclidean and planar
E．it does not provides sufficient variety in geometrical models to describe all the possible ways in which space may curve
What is the 'biggest city in the world？ That is, (21) city has the largest population？ This seems like (22) question to answer, but actually it isn't.
It's actually rather difficult to say which cities (23) the largest. There are two reasons for this difficulty. First of all, it isn't easy to determine a city's boundaries, that is, where a city ends. Nowadays, nearly all cities have a large (24) area around them. So when we talk about the population of a city, we often mean the population of the whole metropolitan area around the city. That means that it's difficult to determine what the population of a city is because it's difficult to define what a city is.
The second reason that it is difficult to 25 the population of different cities is this: it is almost impossible to get (26) about the population of all cities for the same year. For example, we might get an estimate of New York's population in 1979 and an (27) of Mexico City's population in 1981. So we real ly can't compare the numbers because the information is for (28) different years. And the population of cities changes rather quickly, especially in some cases. For example, the population of Jakarta, Indonesia, may increase by 5% each year, so the population figure will change rather quickly.
So we can say that these are our two (29) for comparing the populations of cities: one, it's difficult to determine the (30) of a city, and two, it is difficult to get accurate information.
21. A. what
B. which
C. where
D. how
在字符{A, C, G, T}组成的DNA序列中，A —— T和C —— G是互补对。 判断一个DNA序列中是否存在互补回文串（例如，ATCATGAT的补串是TAGTACTA，与原串形成互补回文串；即要求整个原串的补串是原串的逆序）； 下面DNA序列中存在互补回文串的是：(多选) In DNA sequences consisting of characters {A, C, G, T}, A - T and C - G are complementary pairs respectively. Determine whether a DNA sequence has a complementary palindromic string (For example, ATCATGAT's complementary string is TAGTACTA, with is the palindromic sequence to the original string; in such case the complementary string is also the reverse of the original string); Which of the following DNA sequences have complementary palindromic string？ （multiple choice）
A、CTGATCAG
B、AATTAATT
C、GTACGTAC
D、AGCTAGCT
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