如图是显微镜结构图,请据图回答问题: (1)起放大作用的是目镜和______.

题型:解答题

问题:

如图是显微镜结构图,请据图回答问题:

(1)起放大作用的是目镜和______.

(2)转动时,使镜筒的升降范围很小的结构是______.

(3)若使用放大倍数为目镜10×,物镜45×的镜头组合,则观察到的物像被放大了______倍.

(4)小明在显微镜视野左上方看到一个正在分裂的细胞,他想将此细胞调到视野的正中央以便更好地观察,那么他应该将装片往______移动.

A左上方             B左下方            C 右上方           D右下方.

考点:显微镜的构造和使用
题型:解答题

单击命令按钮时,下列程序的执行结果是  Private Sub Book(x As Integer)    x=x * 2 + l    If x<6 Then      Call Book(x)    End If    X=X * 2 + 1    Print x;  End Sub  Private Sub Command2_Click()    Book2  End Sub

A.23 47

B.10 36

C.22 44

D.24 50

题型:解答题

保险经纪人在洽谈费率时,应结合考虑()以及保险人将来可能索取的服务费用等因素。

A.索赔的保障程度

B.客户保险支出的承受能力与提高该能力的可能性

C.保险人对保费的期望

D.保险人的资本金规模

题型:解答题

在水平地面上,用60N的水平拉力拉重100N的木箱,使木箱在10s内沿拉力方向前进5m,重力所做的功等于______J,拉力做功的功率是______W.

题型:解答题

清代福建戏曲的繁荣,最主要原因是大量的外地戏曲进入福建后,与当地的民间艺术融为一体,成为各具特色的地方戏。

题型:解答题

In our society, we must communicate with other people. A great deal of communicating is performed on a person-to-person (1) by the simple means of speech. If we travel in buses, stand in football match (2) , we are likely to have conversations (3) we give information or opinions, and sometimes have our views (4) by other members of society.

Face-to-face contact is (5) the only form of communication, and during the last two hundred years the (6) of mass communication has become one of the dominating factors of contemporary society. Two things, (7) others, have caused the enormous growth of the communication industry. Firstly, inventiveness has (8) advances in printing, photography and so on. Secondly, speed has revolutionized the (9) and reception of communications so that local news often (10) a back seat to national news.

No longer is the possession of information (11) to a privileged minority. Forty years ago people used to (12) to the cinema, but now far more people sit at home and turn on the TV to watch a program that (13) into millions of houses. Communication is no longer merely concerned (14) the transmission of information. The modern communications industry influences the way people live in society and broadens their horizons by allowing (15) to information, education and entertainment. The printing, broadcasting and advertising industries are all (16) with informing, educating and entertaining. (17) a great deal of the material communicated by the mass media is very valuable to the individual and to the society (18) which he is a part, the vast modern network of communications is (19) to abuse. However, the mass media are with us for better, for worse, and there is no turning (20) .

7()

A.below

B.above

C.over

D.beyond

更多题库