CURRENT_TIMESTAMP(),SYSDATE(),NOW()这三个函数都可以获取当前的日期时间

β is the ratio of _____. A: collector current to emitter current B: base current to collector current C: collector current to base current D: emitter current to collector current

The current ratio is measured as: A: current assets minus current liabilities. B: current assets divided by current liabilities. C: current liabilities minus inventory, divided by current assets. D: cash on hand divided by current liabilities. E: current liabilities divided by current assets.

当事件需要在当前时间过后20秒执行，则该时间的“ON SHCEDULE”表达式为（） A: ON SCHEDULE 20 SECOND B: ON SCHEDULE AT 20 SECOND C: ON SCHEDULE AT CURRENT_TIMESTAMP +20 SECOND D: ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 20 SECOND

The quick ratio is measured as: A: current assets divided by current liabilities. B: cash on hand plus current liabilities, divided by current assets. C: current liabilities divided by current assets, plus inventory. D: current assets minus inventory, divided by current liabilities. E: current assets minus inventory minus current liabilities.

Current liabilities are ______ from current assets to give net current assets.

关于时间日期类型描述正确的为： A: TIMESTAMP和DATETIME类型的列可设置为自动初始化和更新到当前的日期和时间（即当前的时间戳） B: 在列定义时使用DEFAULT CURRENT_TIMESTAMP子句可将当前的时间戳设为默认值，使用ON UPDATE CURRENT_TIMESTAMP子句可自动更新到当前的时间戳。 C: YEAR类型是1个字节的数值类型，用于表示年份值。 D: 在DATE或DATETIME类型的列中，允许存储的日或月的值为零

The cash ratio is measured as: A: current assets divided by current liabilities. B: current assets minus cash on hand, divided by current liabilities. C: current liabilities plus current assets, divided by cash on hand. D: cash on hand plus inventory, divided by current liabilities. E: cash on hand divided by current liabilities.

Which of the following are correct descriptions of Current ratio A: Current assets-current liabilities B: Current assets/current liabilities C: How much of the total current assets is financed by current liabilities D: Inventory days +receivable days-payable days

Unix时间戳(Unix timestamp)是一种函数