不定项选择

食品安全指食品无毒、无害，符合应当有的营养要求，对人体健康不造成任何急性、亚急性或者慢性的危害。

A．正确
B．错误

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单项选择题

安全帽应保证人的头部和帽体内顶部的空间至少有( )毫米才能使用。
A、32毫米
B、20毫米
C、25毫米
D、15毫米

多项选择题

Which of the following descriptions of fertilization are correct:
A、It is the head of the sperm that enters the egg during fertilization.
B、All the cytoplasm of the fertilized egg comes from the egg.
C、Fertilization is the process by which two sex cells fuse to form a new individual with the genetic potential of both parents
D、Sperm capacitation after entering the egg