艾叶除温经止血外，还有的功效是（） A.散瘀消痈 B.收敛止血 C.温中止痛 D.活

对同一金融产品，银行在本地区采用直接营销，而对外埠采用间接营销，这种营销渠道策略称为( )。

A．网点营销策略

B．多渠道策略

C．结合产品生命周期的营销渠道策略

D．单渠道策略

某同学在实验过程中发现氢氧化钠固体露置在空气中一段时间后，发生了潮解，他在家中也曾发现过饼干受潮会变软．这些现象说明了空气中含有______．请结合生活经验或化学另举两例说明空气中含有这种物质．

（1）______；

（2）______．

输水管路的直径为150mm，输水量为981kN/h，则断面平均流速υ=( )。

A．4.57m/s
B．5.55m/s
C．5.67m/s
D．4.98m/s

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

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