腰膨大的病变可以导致双下肢上运动神经元瘫痪和二便功能障碍。()

组织公正与报酬分配的原则不包括（）。

A．分配公平

B．程序公平

C．互动公平

D．法律公平

男性，62岁，近来咽第一口饭时常有梗噎感，首先应考虑

A．食管炎
B．食管息肉
C．食管癌
D．贲门失弛症
E．食管憩室

单相变压器两绕组的绕向相同，同极性端均取首端，则其接线组标号I/I—6。

为节约用水，某市决定用水收费实行超额超收，标准用水量以内每吨2.5元，超过标准的部分加倍收费。某用户某月用水15吨，交水费62.5元，若该用户下个月用水12吨，则应交水费多少钱？（）

A.42.5元

B.47.5元

C.50元

D.55元

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.

Because the key witness died just prior to the start of the trial, Detectives Mack and Smith were not able in determining the extent of administrative corruption.（）

A. Detectives Mack and Smith were not able in determining the extent of

B. therefore the detectives, Mack and Smith, were unable to determine the extent of

C. Mack and Smith, the detectives, were not able of determining the extent to

D. Detectives Mack and Smith were not able to determine the extent of

E. the extent was unable to be determined by Detectives Mack and Smith of