皮皮学，免费搜题
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【单选题】
请根据图片中的机油颜色,选择相应的机油等级A.
一级，油质良好
B.
二级，油质尚可
C.
三级，油质劣化
D.
四级，油质劣化
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反馈参考答案：
举一反三
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. Charles R. Drew was a medical student at Columbia University in New York. Befor...
A.
A place where blood is stored.
B.
A place where blood is sold.
C.
A place where blood is borrowed.
D.
A place where you can use blood.
【单选题】2 g/L 蔗糖溶液的物质的量浓度为(蔗糖摩尔质量为 342 g/mol )
A.
0.01 mol/L
B.
0.1 mol/L
C.
0.001 mol/L
D.
1 mol/L
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. One silly question I simply can't stand is 'How do you feel?' Usually the quest...
A.
show one's consideration for others
B.
are a good way to make friends
C.
are proper to ask a man in action
D.
generally make one feel uneasy
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