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【单选题】
下列有关利福霉素构效关系的描述错误的是( )A.
在利福平的5, 6, 17和19位应存在自由羟基
B.
在C-8上引进不同取代基往往使抗菌活性增加
C.
在利福平的C-17和C-19成酯后活性增加
D.
大环上的双键被还原后，其活性降低
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【单选题】For nearly 100 years, what is the fastest and most popular way to travel?
A.
Bus
B.
Plane
C.
Railway
D.
Car
【单选题】根据 FIDIC施工合同条件，某一项工作实际测量的工程量比工程表规定的工程量的变动超过一定标准时，允许调整该项工作规定的费率或单价，这个标准一般为（ ）
A.
1%
B.
5%
C.
10%
D.
20%
【单选题】李某,男性,13岁,自幼父母离异,自6岁起患者出现说谎、逃学、偷钱、外走现象,经常损害学校公共财物,不听老师管教。该患者行为属于
A.
儿童多动症伴品行问题
B.
精神发育迟滞伴行为问题
C.
儿童多动症伴品行障碍
D.
儿童品行障碍
E.
儿童孤独症伴行为问题
【单选题】As a chairman for nearly ten years, Professor Smith has never ( ) to anything dishonest.
A.
beard
B.
attached
C.
granted
D.
kept
【简答题】For nearly 100 years, women have had the right to vote in America.
【单选题】What was the percent of the people leved in a city as nearly as 100 years ago?
A.
Two out of ten.
B.
Three out of ten.
C.
Four out of ten.
【单选题】Madame Traiviey has lived nearly 115 years.
A.
She died when she was nearly 115.
B.
Madame Traiviey has many more years.
C.
She was very old.
D.
She is very old.
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