问题
单项选择题
以下准则表达式,( )没有把空值或空字符串作为准则。
A.Is Null
B.Is Not Null
C.""
D."(空格)"
答案
参考答案:D
以下准则表达式,( )没有把空值或空字符串作为准则。
A.Is Null
B.Is Not Null
C.""
D."(空格)"
参考答案:D
选择句子补全对话。 | |
A: Hello, Kate. I want to go to the park. __1__ . B: You can put it near the gate. A: Excuse me. Can I bring my bag to the park? B: __2__ . A: Can I eat snacks here? B: __3__ Look at the sign. A: __4__ I like football. B: Sorry,you can't. A: What can I do then? B: __5__
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