皮皮学，免费搜题
登录
搜题
【判断题】
蔬菜的成熟度越高,挥发油的含量就越多,气味就越浓。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】—Did you have any difficulty catching yesterday's lecture? —No. The professor spoke very clearly to make his speech easy _____. [ ]
A.
understood
B.
understand
C.
understanding
D.
to understand
【简答题】—Did you have any difficulty catching yesterday’s lecture? —No. The professor spoke very clearly to make his speech easy _____. A．understood B．understanding C．to be understood D．to understand
【单选题】有一混合蛋白质溶液 , 各种蛋白质的 p I 为 4.6 ; 5.0 ; 5.3 ; 6.7 ; 7.3 。电泳时欲使其中 4 种泳向 负 极,缓冲液的 p H 应该是
A.
4.0
B.
5.0
C.
6.0
D.
7.0
E.
8.0
【单选题】Our teacher always speaks slowly and clearly in class _____.
A.
so as to be understood
B.
to have understood
C.
so as to understand
D.
to understand
【单选题】有一混合蛋白质溶液,各种蛋白质的 p I分别为4.6、5.0、5.3、6.7、7.3。电泳时欲使其中4种泳向正极,缓冲液的 p H应该是
A.
5.0
B.
4.0
C.
6.0
D.
7.0
E.
8.0
【简答题】If the guests have difficulties in understanding, the tour guide must explain each item clearly to them.
【单选题】有一混合蛋白质溶液 , 各种蛋白质的 p I 为 4.1 、 4.7 、 5.3 、 6.7 、 7.3 。电泳时欲使其中 4 种泳向 负 极,缓冲液的 p H应为
A.
4.6
B.
5.5
C.
6.8
D.
7.4
E.
8.3
相关题目：