AMany pens work by capillary action in Btoo narrow tubes in Cwhich the liquid fl

游客2024-01-02  20

问题 AMany pens work by capillary action in Btoo narrow tubes in Cwhich the liquid flows upward when the Dpressure inside is lowered.

选项 A、 
B、 
C、 
D、 

答案 B

解析 Too is incorrect because the sentence does not express cause and result. Correction: very.
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