多项选择题 下面关于BroadcastReceiver正确的是( )。 A. 广播发送的Intent都是隐式启动。 B. BroadcastReceiver有两种注册方式,静态注册和动态注册。 C. BroadcastReceiver必须在AndroidMainfest.xml文件中声明。 D. BroadcastReceiver的使用,一定有一方发送广播,有一方监听注册广播,onReceive方法才会被调用。

问答题 电感器L标注为5R6，则其电感量为        μH

单项选择题 以下不属于危险品的是( )。 A. 氧化剂 B. 爆炸品 C. 放射性物品 D. 受热易变形物品

单项选择题 Directions: In this part of the test, you will hear several short talks and conversations. After each of these, you will hear a few questions. Listen carefully because you will hear the talk or conversation and questions ONLY ONCE. When you hear a question read the four answer choices and choose the best answer to that question. Then write the letter of the answer you have chosen in the corresponding space in your ANSWER BOOKLET. 12)

多项选择题 有助于预防动脉粥样硬化的维生素包括(    )    A．维生素E  B．维生素C  C．维生素B6  D．维生素B12  E．叶酸