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搜题
【单选题】
青霉素对细菌的作用机制是A.
抑制四肽侧链与五肽交联桥的联结
B.
裂解肽聚糖中β-1,4糖苷键
C.
大剂量可作用于革兰阴性菌细胞壁
D.
与细菌核蛋白体结合,干扰蛋白质合
E.
干扰细菌的二分裂
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【单选题】Which of the following statements about the objective test is true?
A.
Examinations in modern times are written, while in ancient times they are spoken.
B.
The objective test has advantages for testing a student's memory of facts and details.
C.
The objective test is the only way to test a student's memory of facts and details.
D.
Each objective question has more than one correct answer.
【简答题】'How does the human brain work?' remains one of the most profound questions confront modern science.
【单选题】The word 'vividly' in the passage is closest in meaning to
A.
distastefully.
B.
moderately.
C.
strikingly.
D.
successfully.
【简答题】JavaScript的变量采用弱类型形式,即不需要声明数据类型,则定义变量有哪几种方式?
【单选题】酸碱滴定时，滴加指示剂的量应少些，对此解释错误的是（）。
A.
指示剂的量过多会使其变色不敏锐
B.
指示剂是弱酸或弱碱，添加过多时会消耗一些滴定溶液
C.
对单指示剂而言，它的加入量对其变色范围有一定的影响
D.
过量指示剂会稀释滴定液
【单选题】Which of the following is true according to the text?
A.
People attached importance to modern Indian art long before the end of 1980s.
B.
Rich Indians, particularly those living abroad, had a strong passion for modern Indian art for ages.
C.
Prices at the 'emerging market of modern art had been climbing and then declining.
D.
Rich Indians did not show interest in modern Indian art until the end of the 1990s.
【多选题】下列关于婴儿营养素需要的说法正确的是（ ）。
A.
脂肪是 4 月龄以下婴儿的能量的主要来源
B.
母乳喂养的婴儿易缺乏维生素 D ，因此需要多晒太阳
C.
婴儿对于能量需要量相对量比成人多
D.
婴儿在 4~6 个月以后需要补铁
【单选题】酸碱滴定时,添加指示剂的量应少些,对此解释错误的是 ( ) 。
A.
指示剂的量过多会使其变色不敏锐
B.
指示剂是弱碱或弱酸，添加过多时会消耗一些滴定剂溶液
C.
对单色指示剂而言，它的加入量对其变色范围有一定的影响
D.
过量指示剂会稀释滴定液
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