普萘洛尔抗甲状腺作用的机制是：
A．抑制甲状腺激素的合成B．阻断β受体C．抑制5-脱碘酶，减少T3生成D．B+CE．以上都不是
参考答案：D
阅读对话,选词填空。
today five-thirty can the day after tomorrow love when my lesson
A: ___1__you study with me?
B: I'd __2___to. __3___?
A: What are you doing ___4___?
B: I have a piano __5___ today. What are you doing tomorrow?
A: I have to visit ___6__ grandmother tomorrow.
B: Oh, no! Well, what are you doing ___7__?
A: That is good. Can you come at ___8_?
B: Sure, I can.
调整（）可降低振荡器辐射。
A、电源电压
B、导通时间
C、截止时间
D、输出幅度
