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【多选题】
配制Na 2 S 2 O 3 标准滴定溶液时，对于影响因素，下列叙述中正确的是（）。A.
固体Na 2 S 2 O 3 •5H 2 O一般都含有杂质，且易风化，应配制成近似浓度的溶液后，再进行标定
B.
Na 2 S 2 O 3 溶液不稳定，浓度易改变，主要是由于溶解的CO 2 和空气中的O 2 的作用
C.
微生物的作用及光线会促进Na 2 S 2 O 3 分解
D.
配制好Na 2 S 2 O 3 溶液后，缓缓加热煮沸10分种，冷却，贮入棕色瓶中，直接进行标定
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【单选题】Mike knows Chinese, you can talk with him in Chinese.
A.
few
B.
a few
C.
little
D.
a little
【简答题】He went on to say that all of the time that he spent on line might have skewed his sense of reality, and that it made him feel lonely and depressed. What does it refer to ?
【单选题】What does “depressed” mean in Paragraph 4?
A.
Very sad and without hope.
B.
Taking a lot of time and effort.
C.
So bad or difficult.
D.
Very generous.
【单选题】Miguel: Hey, Chris. ______
A.
I'm depressed. It's my boss.
B.
What happened?
C.
You seem depressed. Are you OK?
【简答题】What is your counter explanation on the faulty statement of "every Chinese man knows Kongfu"?
【简答题】What does Professor Gordon suggest people who are intensely depressed or suffering from some mental blockage to do?
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