如果用户A对关系SP.QTY有读权，说明A用户可以()

在软件系统维护中，工作量最大的是()

The little girl is ignorant _____ the basic rules of English grammar。

In most countries, the metric system has been _____ for all measurement.

Edison tested more than one thousand materials to see if they could _____ electric ; current and glow.

How can you _____ and watch the country go to ruin?

To begin some activity is to _____ doing it.

You've only got a slight cold. You'll _____ it in a day or two.

He read the story _____ - for everybody present to hear.

He is very _____ and well-qualified, so he should reach the top of this profession.