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

游客2025-02-04 9

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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