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影响骨和牙齿生长的是
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"I wondered if I could have a word with you." The paet tense used in the sentence refers to a ___.
Apast event for exact time reference
Bpresent event for tentativness
Cpresent event for unsertainty
Dpresent event for politeness

"If I were you, I wouldn't wait to propose to her." The subjunctive mood in the sentence is used to __.
Aalleviate hostility
Bexpress unfavorable feelings
Cindicate uncertainty
Dmake a suggestion

青霉素G用于
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口服吸收少，用于肠道感染的是
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