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【单选题】
听力原文：M: Finally, the weekend is here. I will go for a picnic, so do you know tomorrow's weather? W: Now it is 7:32 and here is the weather forecast. Strong wind blew today. And tomorrow it will be colder. If it gets cold enough, there could be heavy snow next week. Q: What is the weather forecast for tomorrow? (18)A.
It will be sunny.
B.
It will be very cold.
C.
It will be windy.
D.
It will be rainy.
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皮皮学刷刷变学霸
举一反三
【单选题】B细胞活化的第一信号
A.
TCR特异结合抗原表位
B.
TCR特异性结合脂类抗原
C.
B细胞的CD40与T细胞CD40L结合
D.
BCR特异性结合蛋白抗原
E.
B细胞的B7分子与T细胞CD28结合