目前对人类环境造成危害的酸雨主要是由下列哪种气体造成的()。A、CO2 B、H2S

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问题:

目前对人类环境造成危害的酸雨主要是由下列哪种气体造成的()。

A、CO2

B、H2S

C、SO2

D、CO

考点:化工总控工考试化工总控工初级化工总控工初级题库
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霍乱()

A.发热、腹痛、腹泻、里急后重脓血便

B.无发热、无腹痛、泻米泔水样大便

C.腹痛、五更泻、果酱状大便

D.发热、腹痛、水样便

E.发热、剧烈腹痛、洗肉水样便

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目前龋病发病学说中为大多数人所接受的是()

A.酸原学说(化学细菌学说)

B.蛋白溶解学说

C.蛋白溶解-螯合学说

D.三联因素学说

E.内因学说

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下列各项,不属于崩漏急症处理的是()

A.清热凉血止崩

B.补气摄血止崩

C.温阳止崩

D.滋阴固气止崩

E.祛瘀止崩

题型:单项选择题

下图是菜豆的种子和幼苗,据图回答问题.

(1)菜豆种子(甲图)的胚由图中标号[______]组成.

(2)从植物体的结构层次来看,一颗种子属于一个(______)A细胞B组织C器官D植物体

(3)菜豆种子与玉米种子比,最明显的区别是图中的[______]______的数目不同.

(4)丙图中结构A由甲图中[______]所示的结构发育而来;

(5)请在乙图中将根尖成熟区的位置圈出来.

(6)如果一颗完整的种子种在适宜的环境条件下,却没有萌发,你认为可能的原因是:______.

题型:单项选择题

Ⅲ、完形填空(共20小题;每小题1.5分,满分30分)

When I was a small child, during the war, we were very poor and we lived in a faraway village. One day, on the road, I found the   51   pieces of a mirror. There was a Garman motorcycle accident.

I tried to find all the pieces and put them   52  , but it was not possible, so I kept only the  53    piece and I made it round. I could   54  with it as a toy and became greatly attracted by the   55  that I could reflect(反射)light to dark places where the sun would never shine—in  56 holes and some other dark places. It became a   57   for me to get light into the darkest places I could find.

I   58  the little mirror, and, as I   59  up, I would take it out when I had nothing to  do and  60  the game, As I became a   61  , I grew to understand that this was not    62  a child’s game but a metaphor(象征)for what I might do with my life. I came to    63  that I am not the light or the source of light. But light—truth, understanding, knowledge—is  64  , and it will shine in many dark places only if I reflect it.

I am just a single piece of a mirror whose   65   design and shape I do not know.    66  , with what I have I can reflect light into the dark places of this   67  —into the black places in the    68    of men—and change some things   69    some people. Perhaps others may see and do the same. This is what I am about. This is the    70  of my life.

51. A. broken                  B. dropped                   C. pointed                    D. sharpened

52. A. back                   B. down                       C. together                   D. up

53. A. best                   B. longest                        C. smallest                    D. largest

54. A. talk                    B. play                         C. flash                        D. share

55. A. idea                    B. fact                          C. decision                   D. reason

56. A. deep                   B. big                          C. pretty                       D. empty

57. A. job                       B. task                         C. game                       D. trouble

58. A. kept                   B. hid                          C. forgot                     D. lost

59. A. came                  B. stood                       C. grew                        D. went

60. A. watch                 B. continue                   C. remember                 D. change

61. A. man                   B. boy                          C. father                       D. grandfather

62. A. always             B. completely               C. really                       D. just

63. A. announce            B. doubt                       C. understand                  D. expect

64. A. absent                 B. home                      C. far                           D. there

65. A. whole                 B. most                        C. half                         D. other

66. A. So                     B. However                  C. Besides                    D. Certainly

67. A. country              B. village                     C. world                         D. city

68. A. hands                 B. brains                      C. eyes                         D. hearts

69. A. on                     B. in                         C. with                        D. like

70. A. way                    B. standard                   C. quality                       D. meaning

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