李爷爷患上了骨质疏松症，体内可能缺乏（　　）

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We sell delicious pizza all over the world. We now need a kitchen assistant for our new shop in Shanghai. He or she should have an interest in making pizza. More importantly, he or she should have working experience in a restaurant.

      He or she will have chances to learn making pizza in Italy. Our Shanghai shop will open next week. If you want to join us, please get in touch with Mr. Buratti right away. The telephone number is 010-89828882.

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