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问题 问答题 简答题

在淡水中能见到的鲻形目鱼类有二种，你能说出它们的名字并加以正确区分吗？

答案

参考答案：

在淡水中能见到的鲻形目鱼类有鲻与鮻。

区别特征为：鲻臀鳍分枝鳍条为8，第一背鳍起点距吻端与距尾鳍基约相等。鮻臀鳍分枝鳍条为9，第一背鳍起点距吻端较距尾鳍基近。

单项选择题

In the United States, the first day nursery was opened in 1854. Nurseries were established in various areas during the (91) half of the 19th century; most of (92) were charitable. Both in Europe and in the U. S. , the day-nursery movement received great (93) during the First World War, when (94) of manpower caused the industrial employment of unprecedented numbers of women. In some European countries nurseries were established (95) in munitions (军火)plants, under direct government sponsorship. (96) the number of nurseries in the U.S. also rose (97) , this rise was accomplished without government aid of any kind. During the years following the First World War, (98) , Federal, State, and local governments gradually began to exercise a measure of control (99) the day nurseries by (100) them and by inspecting and regulating the conditions within the nurseries.
The (101) of the Second World War was quickly followed by an increase in the number of day nurseries in almost all countries, as women were (102) called upon to replace men in the factories. On this (103) the U. S. government immediately came to the support of the nursery schools, (104) $6,000,000 in July, 1942, for a nursery school program for the children of working mothers. Many States and local communities (105) this Federal aid. By the end of the war, in August, 1945, more than 100,000 children were being cared (106) in day-care centers receiving Federal (107) Soon afterward, the Federal government (108) cut down its expenditures for this purpose and later (109) them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their (110) at the end of the war was only partly fulfilled.

A．over

B．in

C．at

D．about
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单项选择题 A1/A2型题

一般认为直肠癌向远端肠管浸润距离不超过距肿瘤边缘（）。

A.1cm

B.2cm

C.4～5cm

D.5～6cm

E.6cm以上
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