由于外部存储设备可能被移除、丢失或者处于其他状态，因此在使用外部设备之前必须使用（ ）方法来确认外部设备是否可用。
A: Environment.getExternalStorageState()
B: Environment.getExternalStorageDirectory()
C: Environment.MEDIA_MOUNTED
D: Environment.WRITE_EXTERNAL_STORAGE
A: Environment.getExternalStorageState()
B: Environment.getExternalStorageDirectory()
C: Environment.MEDIA_MOUNTED
D: Environment.WRITE_EXTERNAL_STORAGE
举一反三
- 由于外部存储设备可能被移除、丢失或者处于其他状态，因此在使用外部设备之前必须使用（）方法来确认外部设备是否可用。
- The external business environment in which a business operates is sometimes known as which of the following:() A: The national environment B: The macro environment C: The international environment D: The micro environment
- Which of the following best defines environmental uncertainty? A: the amount of innovation and creativity in an organization's internal environment B: the amount of resources and expertise in an organization's internal environment C: the amount of change and confidence in an organization's external environment D: the amount of change and complexity in an organization's external environment
- A movie studio lobbying governments to introduce harsher penalties for the mass copying of pirated DVDs is an example of an organisation attempting to influence its _________.（ ） A: marketing environment B: external environment C: internal environment D: target market
- Corporate culture defines the external environment of a company.