皮皮学，免费搜题
登录
搜题
【单选题】
标定硫酸亚铁铵标准溶液时，经常使用的基准物是( )。A.
NaCl
B.
K2Cr2O7
C.
Zn2+标准溶液
D.
Na2C2O4
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】Dr. Trimble often heard students say that _________.
A.
their mind failed to work when faced with a test
B.
they had difficulty focusing on the test items
C.
they could not think of a way to get rid of test anxiety
D.
they began panicking well ahead of a test
【单选题】听力原文：Dr. Carter is a very busy man. Even so, he often takes time to have a cup of coffee with his colleagues. (24)
A.
Dr. Carter avoids the company of others whenever possible.
B.
Dr. Carter is too busy to have a cup of coffee.
C.
Dr. Carter is a quite sociable person.
D.
Dr. Carter is a lonely man according to his colleagues.
【简答题】Connecting with Patients Dr. Paris often treats several generations of a family over many years. “He’s seen us through two births, one operation, multiple earaches, a broken wrist and a recovery from ...
【简答题】在万能卧式铣床上用三面刃铣刀铣削直角沟槽，若工作台零位未对准，铣出的直角沟槽会（）。
相关题目：