【简答题】
若X~B(5,14),则DX的值为______.
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【简答题】从方框内选择词的适当形式填空。northern, stop, ride, quickly, forget, Canada, fish, sightsee, plan, babysit 1.—What are you doing for vacation? —I'm ______ my sister. 2. In ______ America, most students go to school ...
【简答题】从方框内选择词的适当形式填空。northern, stop, ride, quickly, forget, Canada, fish, sightsee, plan, babysit 1.—What are you doing for vacation? —I'm ______ my sister. 2. In ______ America, most students go to school ...
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