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【单选题】
加 40 mL0.15mol/L HCl 溶液至 60mL 0.10mol/L Na 2 CO 3 溶液中 , 该溶液的合理的简化质子条件是( ) ( A ) [H 2 PO 4 - ]=[HPO 4 2- ] ( B ) [H 3 PO 4 ]=[HPO 4 2- ] ( C ) [PO4 3 - ]=[HPO 4 2- ] ( D ) [H 3 PO 4 ]=[H 2 PO 4 - ]A.
[H2PO4－]=[HPO42-]
B.
[H3PO4]=[HPO42-]
C.
[PO43－]=[HPO42-]
D.
[H3PO4]=[H2PO4-]
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【单选题】To maneuver a drone up, down, sideways or forward require three main communication links . Please match the name of the feature with the sentence.
A.
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B.
Non-finite forms of verbs
C.
Passive voice
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【单选题】Please remind others of the deadline and forward the attachment to all.
A.
转告
B.
前锋
C.
前进
D.
转发