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【多选题】
五环三萜皂苷元的结构类型有
A.
α-香树脂烷型或型
B.
β-香树脂烷型或齐墩果烷型
C.
羽扇豆烷型
D.
达玛烷型
E.
羊毛脂烷型
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参考答案:
举一反三
【单选题】在C程序中,可以作为用户标识符的一组标识符是( )
A.
Void define WORD
B.
as_b3 _224 Else
C.
Switch -wer case
D.
4b DO SIG
【单选题】What is the authors opinion about work?
A.
Work is very tiresome, especially when toe excessive.
B.
Work is a cause of the greatest delight of life.
C.
Work can at least give relief from boredom.
D.
Work can keep people busy as if they were poor.
【简答题】读世界人种的分布图,完成下列要求。 (1)填出图例的名称:A___________,B______________,C_____________。 (2)白色人种主要分布在_________________,其体质特征是______________。 (3)黄色人种主要集中在_________________,其体质特征是______________。 (4)黑色人种主要分布在__________...
【单选题】如图13-1所示,图中(3)代表的是企业持有现金的何种成本?
A.
总成本
B.
机会成本
C.
管理成本
D.
交易成本
【单选题】The authors incorrectly contend that people value their leisure time more than their time at work.
A.
supporting
B.
neutral
C.
distancing
【单选题】What is the authors opinion about work?
A.
Work is very tiresome, especially when too excessive.
B.
Work is a cause of the greatest delight of life.
C.
Work can at least give relief from boredom.
D.
Work can keep people busy as if they were poor.
【单选题】以下哪种设备是笔记本电脑依据扩展总线使桌面设备(例如:AC电源、完整的键盘、CRT显示器以及Modem、鼠标、标准PC扩展端口等)整合在一起的有计划的扩展设备()。
A.
复制端口
B.
扩展坞
C.
便携总线扩展器
D.
底板
【单选题】Tom didn’t like being together with other students, so he often read books after class.
A.
lonely
B.
by him
C.
one
D.
alone
【单选题】在C程序中,可以作为用户标识符的一组标识符是( )。
A.
void define WORD
B.
as_b3 _224 Else
C.
switch _wel ease
D.
4b DO SIG
【单选题】Tom often ________ his friend on Saturday evening.
A.
phones
B.
phone
C.
phoned
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