题目内容

How many languages are there in the world?

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How many typical people are there on Earth?

How many Chinese speakers are there on Earth?

The typical person on Earth is male. He is --- years old and is --- centimeters (about --- feet ---inches) tall.The most typical person lives in a --- and has a ---.He also speaks --- Chinese.

毛果芸香碱属于下列哪一类药

A. M受体激动药
B. M受体阻断药
C. 胆碱酯酶复活药
D. N受体激动药
E. N受体阻断药

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