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【多选题】
减少梁变形的措施有(多选)A.
减小梁的抗弯强度
B.
减小梁的跨度
C.
改变荷载的施加方式以减小弯矩
D.
增大梁的跨度
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皮皮学刷刷变学霸
举一反三
【单选题】What useful information can be drawn from the passage by a chronic Lyme patient?
A.
We are still not out of the woods in curing the disease.
B.
They should take cautions against being further inflected.
C.
We have both traditional and new ways to treat the disease.
D.
They should keep alert while traveling in a Lyme-infected area.
【单选题】What useful book! And book was given to me by my father as a birthday present last year.
A.
the, /
B.
an, the
C.
/, /
D.
a, the
【单选题】执行以下程序后，假设用户输入123，则输出结果为：n=int(input('请输入一个三位正整数:'))a=n//100b=n//10%10c=n%10print(a,end=',')print(b,end=',')print(c)
A.
1,2,3,
B.
1, 2, 3
C.
1,2,3
D.
1,2, 3
【多选题】Look at the references at the end of the text. What useful information do these give?
A.
The list of references shows the various sources used as supporting evidence by the writer.
B.
The references shows little useful information.
C.
The references to official reports and organizations suggest that the sources are both reliable and current.
D.
The references are about relevant researches conducted by the writer.
【单选题】—What useful book it is! —Yeah, it tells you how to play guitar.
A.
an； the
B.
a； a
C.
a； the
D.
an； a
【单选题】丙泊酚，其化学名为2，6—双异丙基苯酚，是目前临床上普遍用于麻醉诱导、麻醉维持、ICU危重病人镇静的一种新型快速、短效静脉麻醉药。其结构如图： 关于丙泊酚，下列说法正确的是（ ）
A.
分子式为C 10 H 20 O
B.
分子中所有碳原子可能在同一平面中
C.
该物质的 1 H核磁共振谱图中有5个特征峰，峰值强度比大概为：1：1：2：2：12
D.
该物质结构中有2个手性碳原子
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