皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
SELECT语句使用关键字(  )可以把重复行屏蔽掉。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】液相色谱中的示差折光检测器与紫外、荧光检测器不同,是通用型检测器。但它灵敏度低、易受温度和流速影响,而且不能()等等。
【单选题】_______ money, she is quite rich. However this does not mean that she is happy.
A.
Concerning
B.
In terms of
C.
As to
D.
In the light of
【单选题】The little girl is not quite confident ______ her ability to go to a key university and she is very sensitive _____ everything concerned with it. [       ]
A.
of; of
B.
in; to
C.
of; with
D.
about; to
【单选题】Which of the following is true about Oprah Winfrey?
A.
She is not straightforward with her audience.
B.
She prefers fashionable and exciting topics.
C.
She is not quite successful as a talk show host.
D.
She is less annoying than those who slander others.
【单选题】She is quite capable, but the problem is that she is not____.
A.
consistent
B.
insistent
C.
beneficent
D.
resistant
【单选题】现代船用柴油机的结构特点有( )。
A.
活塞环数量减少 Ⅱ.燃烧室部件采用"薄壁强背"结构 Ⅲ.低速机采用焊接式整体曲轴 Ⅳ.中速机采用锻造整体曲轴 Ⅴ.中速机普遍采用倒挂式主轴承 Ⅵ.低速机气缸盖采用锻造结构
B.
Ⅰ+Ⅱ+Ⅳ+Ⅵ
C.
Ⅰ+Ⅱ+Ⅲ+Ⅴ
D.
Ⅲ+Ⅳ+Ⅴ+Ⅵ
E.
Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ+Ⅵ
【判断题】• 荧光检测器是高效液相色谱法的通用型检测器。( )
A.
正确
B.
错误
【单选题】采用极差法估计总体标准差的数据数量 n 为
A.
≤ 5
B.
≤ 10
C.
≤ 15
D.
≤ 20
【单选题】现代船用柴油机的结构特点有( )。I.活塞环数量减少 II.燃烧室部件采用“薄壁强背”结构 III.低速机采用焊接式整体曲轴 IV.中速机采用锻造整体曲轴 V.中速机普遍采用倒挂式主轴承 VI.低速机气缸盖采用锻造结构
A.
Ⅰ+Ⅱ+Ⅳ+Ⅵ
B.
Ⅰ+Ⅱ+Ⅲ+Ⅴ
C.
Ⅲ+Ⅳ+Ⅴ+Ⅵ
D.
Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ+Ⅵ
【单选题】The little girl is not quite confident ____ her ability to go to a key university and she is very sensitive _____ anything concerned with it. [     ]
A.
of; of
B.
in; to
C.
of; with
D.
about; about
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题