问题
单项选择题
下列选项中不合法的十六进制是( )。
A．0Xabc
B．Ox11
C．0x18
D．0Xce
E．oxff
答案
参考答案：E
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下列选项中不合法的十六进制是( )。
A．0Xabc
B．Ox11
C．0x18
D．0Xce
E．oxff
参考答案：E
现实验室有药品5%的过氧化氢溶液及少量二氧化锰固体，为证明二氧化锰是过氧化氢分解的催化剂，请你帮小明同学设计以下实验方案：
| 实验操作 | 实验现象及结论 | |
| 实验1 | ______ | ______ |
| 实验2 | ______ | ______ |
| 实验3 | ______ | ______ |
| 完形填空。 | ||||
| Bedtime stories are one of the delights of early childhood. But according to Dr.Julie Sprecadbury form Queensland University. parents should not 1 up reading to their children 2 they enter mary school. She says listening to.reading and discussing the stories help chidren's 3 . "My 4 indicates that once children can read themseives. most parents stop reading 5 them." Dr.Spreadbury says. " 6 may be at the end of Year I,which is far too 7 ." Dr.Spreadbury says 8 reading not only gives children a good start at school.but brings parents and their children closer. "This makes it 9 for then to open up and talk to parents about things that are worrying them,or things they are 10 in their everyday life." | ||||
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