下图中的大圈、中圈和小圈依次所代表的地理概念是 [ ] A、岩石圈、地幔、地壳

据报道，抢注商标，尤其是抢注名牌商标和老字号商标，在国内外已是屡见不鲜。在我国，注册一个商标需要花费约几千元，而当这个商标出售后就可带来几倍甚至几十倍的回报，可见：

A．商标只具有使用价值

B．商标只是产品的标识

C．商标是无形资产，具有价值

D．商标是有形资产，具有价值

孕妇对能量和各种营养素的需要()

A．与孕前相同

B．孕早期开始增加

C．孕晚期开始增加

D．孕中期开始增加

E．能量孕早期开始增加，其余从孕晚期开始增加

下列哪些不是二氧化碳对呼吸的调节途径（）。

A.直接刺激呼吸中枢

B.刺激颈动脉体和主动脉体

C.加强牵张反射

D.刺激延髓化学敏感区

E.刺激外周呼吸肌

唐太宗的“太宗”指的是他的什么？

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

The stock market collapse of 1929 had far-reaching consequences for the national economy, causing a nationwide collapse in home values, putting millions out of work, and by erasing the investment savings of one-fifth of the population.（）

A. and by erasing

B. and erasing

C. and having erased

D. and erased

E. by erasing