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【单选题】
听力原文：M: Sam's voice sounds awful. I could barely hear him. I think he needs to take a few days off. W: Yes, he' s got a terrible sore throat. The doctor said he shouldn't even attempt to whisper. Q: What does the woman imply about Sam? (18)A.
It's harmful for him to use his voice.
B.
He needs to see a doctor.
C.
He hasn't been taking his medicine.
D.
It's difficult to understand him when he whispers.
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【简答题】主要产生IL-2的细胞是
【单选题】某顾客配戴框架眼镜的度数为-5.00，其瞳距为60mm，但他目前所戴眼镜的瞳距为66mm则该镜片对于戴镜者所每只眼产生的棱镜效应为（）。
A.
1.5△BI
B.
1.5△BO
C.
3.0△BI
D.
3.0△BO
E.
0
【简答题】某顾客配戴框架眼镜的度数为-6.00DS,其瞳距60毫米,但他目前所戴眼镜的光学中心距为毫米,则该镜片对于戴镜者每只眼所产生的棱镜效应 ()
【简答题】某顾客配戴框架眼镜的度数为+5.00DS,其瞳距60毫米,但他目前所戴眼镜的光学中心距为66毫米,则该镜片对于戴镜者每只眼所产生的棱镜效应 ()