执行下列程序后,显示结果为( )。 *MAIN.PRG A=3 B=4 DO AA1 A,B PROCEDURE AA1 PRIVATE B A=5 B=A RETURN
A. 3 4
B. 5 4
C. 5 5
D. 5 3
下列测试姓名字段值是否为空,正确的是( )。
A. 姓名=NULL
B. 姓名=!NULL
C. 姓名NULL
D. 姓名IS NULL
When the heavy snow started, it was ______ noon.
A. hardly
B. closely
C. nearly
D. mostly
The lost wallet is to be kept here until the loser comes to ______ it.
A. call for
B. call on
C. call out
D. call up