After a knock at the door, the child hea

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问题选择题

After a knock at the door, the child heard his mother’s voice ____ him. [ ]

A. calling

B. called

C. being called

D. to call

答案

答案：A

选择题

You can use MSN to _________ with each other online. [ ]

A．speak

B．talk

C．tell

D．say

填空题案例分析题

在神经和激素的调控下人体能够适应内外环境的变化。右图是甲状腺激素分泌调控模式图，主要包括①至⑤五个过程，请回答下列问题：

TSH能与甲状腺细胞的细胞膜表面的（）结合，反映出细胞膜具有（）功能。