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【单选题】
The teacher demanded that the students（）from speaking while the class is in progress.
A.
avoid
B.
refrain
C.
stop
D.
control
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举一反三
【单选题】正常血细胞的过碘酸-雪夫反应(染色反应)正确的是
A.
嗜酸性粒细胞的嗜酸性颗粒呈阳性
B.
嗜碱性粒细胞的嗜碱性颗粒呈阳性
C.
大多数淋巴细胞呈阳性
D.
巨核细胞呈阴性
E.
大多数浆细胞呈阳性
【单选题】下列各项叙述错误的是
A.
瑞氏(wright)染色过程中染液固定血细胞的时间一般为1min左右
B.
瑞氏染色时，如染色标本颜色偏红，则多见于染色时间短或缓冲液的pH偏酸
C.
吉姆萨染色法与瑞氏法相比，前者嗜碱性颗粒易于着色
D.
血涂片染色时，常用pH 6.4～6.8的磷酸盐缓冲液
E.
可用pH 6.4缓冲液进行瑞氏染色
【单选题】74（） A．when B．why C．what D．how
A.
The simplest way of putting an idea down on paper is to draw a picture. That was (61) men first began to write, six thousand years ago or more. All (62) scripts (文字) have been developed from picture-writing of (63) sort. The English alphabet we now use (64) to us over a long period of time from the (65) of ancient Egypt.
B.
Picture-writing, called hieroglyphics (象形文字), could be used to express (66) as well as objects. (67) , a drawing of a man would (68) the object "man", while (69) of a man lying on the ground (70) a spear in him would mean the idea "death". Later, some drawings came to stand for sounds as well. (71) in Egyptian hieroglyphics the (72) of a house stood (73) for the object "house" and for the sound "pr", (74) in spoken Egyptian meant "house".
C.
(75) the Egyptians, the Chinese and the American Indians also developed their own kinds of picture-writing. However, with picture-writing, only (76) much could be said. Much more (77) to be left unsaid. It would have (78) hundreds of thousands of pictures to express (79) people wanted to express (80) a person could ever hope to learn in a life-time.
相关题目：
【单选题】正常血细胞的过碘酸-雪夫反应(染色反应)正确的是
A.
嗜酸性粒细胞的嗜酸性颗粒呈阳性
B.
嗜碱性粒细胞的嗜碱性颗粒呈阳性
C.
大多数淋巴细胞呈阳性
D.
巨核细胞呈阴性
E.
大多数浆细胞呈阳性
【单选题】下列各项叙述错误的是
A.
瑞氏(wright)染色过程中染液固定血细胞的时间一般为1min左右
B.
瑞氏染色时，如染色标本颜色偏红，则多见于染色时间短或缓冲液的pH偏酸
C.
吉姆萨染色法与瑞氏法相比，前者嗜碱性颗粒易于着色
D.
血涂片染色时，常用pH 6.4～6.8的磷酸盐缓冲液
E.
可用pH 6.4缓冲液进行瑞氏染色
【单选题】74（） A．when B．why C．what D．how
A.
The simplest way of putting an idea down on paper is to draw a picture. That was (61) men first began to write, six thousand years ago or more. All (62) scripts (文字) have been developed from picture-writing of (63) sort. The English alphabet we now use (64) to us over a long period of time from the (65) of ancient Egypt.
B.
Picture-writing, called hieroglyphics (象形文字), could be used to express (66) as well as objects. (67) , a drawing of a man would (68) the object "man", while (69) of a man lying on the ground (70) a spear in him would mean the idea "death". Later, some drawings came to stand for sounds as well. (71) in Egyptian hieroglyphics the (72) of a house stood (73) for the object "house" and for the sound "pr", (74) in spoken Egyptian meant "house".
C.
(75) the Egyptians, the Chinese and the American Indians also developed their own kinds of picture-writing. However, with picture-writing, only (76) much could be said. Much more (77) to be left unsaid. It would have (78) hundreds of thousands of pictures to express (79) people wanted to express (80) a person could ever hope to learn in a life-time.
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