多项选择题

碱水解法测乳脂肪的三大步骤是( ) A.
抽提 B.
碱水解 C.
水浴 D.
称量

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单项选择题

Why is Tigger gloomy and depressed?
A、Because he is lonely in the neighborhood.
B、Because he doesn’t have friends.
C、Because there are no other tigers in the neighborhood.
D、Because his family live far away from him.

单项选择题

国家的质量监督是指国家授权指定的第三方专门机构，以公正立场对商品质量进行的监督检查。（）

A．对
B．错