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【判断题】
要进行粗、精加工的零件一般都要将工序分开。（ ）A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】Does your trainer think you could become
【单选题】某二元弱酸H2A的Ka1=6×10-8,Ka2=8×10-14,若其浓度为0.05mol•L-1,则溶液中A2-的浓度约为 ( )
A.
6×10-8mol•L-1
B.
8×10-14mol•L-1
C.
4×10-8mol•L-1
D.
4×10-14mol•L-1
【单选题】What does the dog trainer do?
A.
He trains dogs to appear on his TV show.
B.
He helps people understand dogs.
C.
He studies personalities and behavior.
【简答题】What advice does the trainer give?
【单选题】What does an animal trainer do?
A.
Exercises animals
B.
cleans equipment
C.
give them food and water
D.
all of these
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